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diff --git a/chromium/ash/ash_switches.cc b/chromium/ash/ash_switches.cc
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+++ b/chromium/ash/ash_switches.cc
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+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "ash/ash_switches.h"
+
+#include "base/command_line.h"
+
+namespace ash {
+namespace switches {
+
+// Enables an animated transition from the boot splash screen (Chrome logo on a
+// white background) to the login screen.  Implies
+// |kAshCopyHostBackgroundAtBoot| and doesn't make much sense if used in
+// conjunction with |kDisableBootAnimation| (since the transition begins at the
+// same time as the white/grayscale login screen animation).
+const char kAshAnimateFromBootSplashScreen[] =
+    "ash-animate-from-boot-splash-screen";
+
+// Constrains the pointer movement within a root window on desktop.
+const char kAshConstrainPointerToRoot[] = "ash-constrain-pointer-to-root";
+
+// Copies the host window's content to the system background layer at startup.
+// Can make boot slightly slower, but also hides an even-longer awkward period
+// where we display a white background if the login wallpaper takes a long time
+// to load.
+const char kAshCopyHostBackgroundAtBoot[] = "ash-copy-host-background-at-boot";
+
+// Enable keyboard shortcuts useful for debugging.
+const char kAshDebugShortcuts[] = "ash-debug-shortcuts";
+
+// UI to show preferred networks in the status area (for testing).
+const char kAshDebugShowPreferredNetworks[] =
+    "ash-debug-show-preferred-networks";
+
+// Indicates that the wallpaper images specified by
+// kAshDefaultWallpaper{Large,Small} are OEM-specific (i.e. they are not
+// downloadable from Google).
+const char kAshDefaultWallpaperIsOem[] = "ash-default-wallpaper-is-oem";
+
+// Default wallpaper to use (as paths to trusted, non-user-writable JPEG files).
+const char kAshDefaultWallpaperLarge[] = "ash-default-wallpaper-large";
+const char kAshDefaultWallpaperSmall[] = "ash-default-wallpaper-small";
+
+// Use the normal visual style for the caption buttons (minimize, maximize,
+// restore, close).
+const char kAshDisableAlternateFrameCaptionButtonStyle[] =
+    "ash-disable-alternate-caption-button";
+
+// Disable the alternate shelf layout.
+const char kAshDisableAlternateShelfLayout[] =
+    "ash-disable-alternate-shelf-layout";
+
+#if defined(OS_CHROMEOS)
+// Disable the status tray volume menu for allowing the user to choose an audio
+// input and output device.
+const char kAshDisableAudioDeviceMenu[] =
+    "ash-disable-audio-device-menu";
+#endif
+
+// Disable auto window maximization logic.
+const char kAshDisableAutoMaximizing[] = "ash-disable-auto-maximizing";
+
+// Disables the limitter to throttle how quickly a user
+// can change display settings.
+const char kAshDisableDisplayChangeLimiter[] =
+    "ash-disable-display-change-limiter";
+
+#if defined(OS_CHROMEOS)
+// Disable the notification when a low-power USB charger is connected.
+const char kAshDisableUsbChargerNotification[] =
+    "ash-disable-usb-charger-notification";
+
+// TODO(jamescook): Remove this unused flag. It exists only to allow the
+// "Enable audio device menu" about:flags item to have the tri-state
+// default/enabled/disabled UI.
+const char kAshEnableAudioDeviceMenu[] = "ash-enable-audio-device-menu";
+#endif  // defined(OS_CHROMEOS)
+
+// Enable advanced gestures (e.g. for window management).
+const char kAshEnableAdvancedGestures[] = "ash-enable-advanced-gestures";
+
+// Use alternate visual style for the caption buttons (minimize, maximize,
+// restore, close). The alternate style:
+// - Adds a dedicated button for minimize.
+// - Removes the maximize button's help bubble.
+const char kAshEnableAlternateFrameCaptionButtonStyle[] =
+    "ash-enable-alternate-caption-button";
+
+// Always enable brightness control. Used by machines that don't report their
+// main monitor as internal.
+const char kAshEnableBrightnessControl[] = "ash-enable-brightness-control";
+
+// Enable ability to dock windows at the desktop edge.
+const char kAshEnableDockedWindows[] = "ash-enable-docked-windows";
+
+// Disable dragging items off the shelf to unpin them.
+const char kAshDisableDragOffShelf[] = "ash-disable-drag-off-shelf";
+
+// Enables putting all windows into immersive fullscreen via <F4>.
+const char kAshEnableImmersiveFullscreenForAllWindows[] =
+    "ash-enable-immersive-all-windows";
+
+#if defined(OS_CHROMEOS)
+// Enables the "full multi profile mode" - as it was in M-31.
+const char kAshEnableFullMultiProfileMode[] =
+    "ash-enable-full-multi-profile-mode";
+#endif
+
+#if defined(OS_LINUX)
+// Enable memory monitoring.
+const char kAshEnableMemoryMonitor[] = "ash-enable-memory-monitor";
+#endif
+
+#if defined(OS_CHROMEOS)
+// Enables the multi user icons in the system tray.
+const char kAshEnableMultiUserTray[] = "ash-enable-multi-user-tray";
+#endif
+
+// Enables the Oak tree viewer.
+const char kAshEnableOak[] = "ash-enable-oak";
+
+// Disables overview mode for window switching.
+const char kAshDisableOverviewMode[] = "ash-disable-overview-mode";
+
+// Enables software based mirroring.
+const char kAshEnableSoftwareMirroring[] = "ash-enable-software-mirroring";
+
+// Enables "sticky" edges instead of "snap-to-edge"
+const char kAshEnableStickyEdges[] = "ash-enable-sticky-edges";
+
+// Enables showing the tray bubble by dragging on the shelf.
+const char kAshEnableTrayDragging[] = "ash-enable-tray-dragging";
+
+// Forces chrome to use mirror mode when an external display is connected.
+const char kAshForceMirrorMode[] = "ash-force-mirror-mode";
+
+// Wallpaper to use in guest mode (as paths to trusted, non-user-writable JPEG
+// files).
+const char kAshGuestWallpaperLarge[] = "ash-guest-wallpaper-large";
+const char kAshGuestWallpaperSmall[] = "ash-guest-wallpaper-small";
+
+// Hides notifications that are irrelevant to Chrome OS device factory testing,
+// such as battery level updates.
+const char kAshHideNotificationsForFactory[] =
+    "ash-hide-notifications-for-factory";
+
+// Sets a window size, optional position, and optional scale factor.
+// "1024x768" creates a window of size 1024x768.
+// "100+200-1024x768" positions the window at 100,200.
+// "1024x768*2" sets the scale factor to 2 for a high DPI display.
+const char kAshHostWindowBounds[] = "ash-host-window-bounds";
+
+// Specifies the delay in milliseconds before beginning overview mode after
+// getting an alt tab keypress.
+const char kAshOverviewDelayOnAltTab[] = "ash-overview-delay-on-alt-tab";
+
+// Specifies the layout mode and offsets for the secondary display for
+// testing. The format is "<t|r|b|l>,<offset>" where t=TOP, r=RIGHT,
+// b=BOTTOM and L=LEFT. For example, 'r,-100' means the secondary display
+// is positioned on the right with -100 offset. (above than primary)
+const char kAshSecondaryDisplayLayout[] = "ash-secondary-display-layout";
+
+// Use the old behavior where the user can pick the width of a side maximized
+// window. The user selects the width of the side maximized window based on how
+// far off the edge of the work area they drag the window.
+const char kAshMultipleSnapWindowWidths[] = "ash-multiple-snap-window-widths";
+
+// Enables the heads-up display for tracking touch points.
+const char kAshTouchHud[] = "ash-touch-hud";
+
+// Use alternate layout of the shelf for testing a new look and feel:
+// Slightly smaller profile, only 2 states for the "bar highlight" on
+// launcher buttons, app list icon with more visible state indication,
+// app list icon repositionable and defaulting as 1st item in shelf,
+// more visible state indication for background on status area.
+// crbug's [244983, 244990, 244994, 245005, 245012]
+const char kAshUseAlternateShelfLayout[] = "ash-use-alternate-shelf";
+
+// Flags explicitly show or hide the shelf alignment menu.
+const char kShowShelfAlignmentMenu[] = "show-launcher-alignment-menu";
+const char kHideShelfAlignmentMenu[] = "hide-launcher-alignment-menu";
+
+// Uses the 1st display in --ash-host-window-bounds as internal display.
+// This is for debugging on linux desktop.
+const char kAshUseFirstDisplayAsInternal[] =
+    "ash-use-first-display-as-internal";
+
+// (Most) Chrome OS hardware reports ACPI power button releases correctly.
+// Standard hardware reports releases immediately after presses.  If set, we
+// lock the screen or shutdown the system immediately in response to a press
+// instead of displaying an interactive animation.
+const char kAuraLegacyPowerButton[] = "aura-legacy-power-button";
+
+#if defined(OS_WIN)
+// Force Ash to open its root window on the desktop, even on Windows 8 where
+// it would normally end up in metro.
+const char kForceAshToDesktop[] = "ash-force-desktop";
+
+#endif
+
+// Disallow items to be dragged from the app launcher list into the launcher.
+const char kAshDisableDragAndDropAppListToLauncher[] =
+    "ash-disable-drag-and-drop-applist-to-launcher";
+
+bool UseAlternateFrameCaptionButtonStyle() {
+  // For the sake of simplicity, the alternate caption button style is only
+  // used if snapped windows are always 50% of the screen's width.
+  CommandLine* command_line = CommandLine::ForCurrentProcess();
+  return command_line->HasSwitch(kAshEnableAlternateFrameCaptionButtonStyle) &&
+      !command_line->HasSwitch(kAshMultipleSnapWindowWidths);
+}
+
+bool UseAlternateShelfLayout() {
+  return !CommandLine::ForCurrentProcess()->
+      HasSwitch(kAshDisableAlternateShelfLayout);
+}
+
+bool UseDragOffShelf() {
+  return !CommandLine::ForCurrentProcess()->
+      HasSwitch(kAshDisableDragOffShelf);
+}
+
+bool ShowShelfAlignmentMenu() {
+  return !CommandLine::ForCurrentProcess()->
+      HasSwitch(kHideShelfAlignmentMenu);
+}
+
+// Returns true if the full multi profile mode (M-31 version) is active.
+bool UseFullMultiProfileMode() {
+#if defined(OS_CHROMEOS)
+  return CommandLine::ForCurrentProcess()->
+      HasSwitch(kAshEnableFullMultiProfileMode);
+#else
+  return false;
+#endif
+}
+
+bool UseMultiUserTray() {
+#if defined(OS_CHROMEOS)
+  // TODO(skuhne): If this gets removed for good, remove also
+  // |SystemTray::user_items_| and the use of it.
+  return CommandLine::ForCurrentProcess()->HasSwitch(kAshEnableMultiUserTray);
+#else
+  return false;
+#endif
+}
+
+bool UseOverviewMode() {
+  return !CommandLine::ForCurrentProcess()->HasSwitch(kAshDisableOverviewMode);
+}
+
+bool UseDockedWindows() {
+  return CommandLine::ForCurrentProcess()->HasSwitch(kAshEnableDockedWindows);
+}
+
+#if defined(OS_CHROMEOS)
+bool ShowAudioDeviceMenu() {
+  return !CommandLine::ForCurrentProcess()->
+      HasSwitch(kAshDisableAudioDeviceMenu);
+}
+
+bool UseUsbChargerNotification() {
+  return !CommandLine::ForCurrentProcess()->
+      HasSwitch(kAshDisableUsbChargerNotification);
+}
+#endif
+
+}  // namespace switches
+}  // namespace ash