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diff --git a/chromium/content/browser/renderer_host/render_widget_host_view_base.h b/chromium/content/browser/renderer_host/render_widget_host_view_base.h
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+++ b/chromium/content/browser/renderer_host/render_widget_host_view_base.h
@@ -0,0 +1,166 @@
+// 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.
+
+#ifndef CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_BASE_H_
+#define CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_BASE_H_
+
+#if defined(OS_MACOSX)
+#include <OpenGL/OpenGL.h>
+#endif
+
+#if defined(TOOLKIT_GTK)
+#include <gdk/gdk.h>
+#endif
+
+#include <string>
+#include <vector>
+
+#include "base/memory/scoped_ptr.h"
+#include "base/callback_forward.h"
+#include "content/common/content_export.h"
+#include "content/port/browser/render_widget_host_view_port.h"
+#include "ui/base/range/range.h"
+#include "ui/gfx/native_widget_types.h"
+#include "ui/gfx/rect.h"
+
+namespace content {
+
+class RenderWidgetHostImpl;
+
+// Basic implementation shared by concrete RenderWidgetHostView
+// subclasses.
+//
+// Note that nothing should use this class, except concrete subclasses
+// that are deriving from it, and code that is written specifically to
+// use one of these concrete subclasses (i.e. platform-specific code).
+//
+// To enable embedders that add ports, everything else in content/
+// should use the RenderWidgetHostViewPort interface.
+//
+// RenderWidgetHostView class hierarchy described in render_widget_host_view.h.
+class CONTENT_EXPORT RenderWidgetHostViewBase
+    : public RenderWidgetHostViewPort {
+ public:
+  virtual ~RenderWidgetHostViewBase();
+
+  // RenderWidgetHostViewPort implementation.
+  virtual bool OnMessageReceived(const IPC::Message& msg) OVERRIDE;
+  virtual void SelectionChanged(const string16& text,
+                                size_t offset,
+                                const ui::Range& range) OVERRIDE;
+  virtual void SetBackground(const SkBitmap& background) OVERRIDE;
+  virtual const SkBitmap& GetBackground() OVERRIDE;
+  virtual gfx::Size GetPhysicalBackingSize() const OVERRIDE;
+  virtual float GetOverdrawBottomHeight() const OVERRIDE;
+  virtual bool IsShowingContextMenu() const OVERRIDE;
+  virtual void SetShowingContextMenu(bool showing_menu) OVERRIDE;
+  virtual string16 GetSelectedText() const OVERRIDE;
+  virtual bool IsMouseLocked() OVERRIDE;
+  virtual void UnhandledWheelEvent(
+      const WebKit::WebMouseWheelEvent& event) OVERRIDE;
+  virtual InputEventAckState FilterInputEvent(
+      const WebKit::WebInputEvent& input_event) OVERRIDE;
+  virtual void GestureEventAck(int gesture_event_type,
+                               InputEventAckState ack_result) OVERRIDE;
+  virtual void SetPopupType(WebKit::WebPopupType popup_type) OVERRIDE;
+  virtual WebKit::WebPopupType GetPopupType() OVERRIDE;
+  virtual BrowserAccessibilityManager*
+      GetBrowserAccessibilityManager() const OVERRIDE;
+  virtual void ProcessAckedTouchEvent(const TouchEventWithLatencyInfo& touch,
+                                      InputEventAckState ack_result) OVERRIDE;
+  virtual SmoothScrollGesture* CreateSmoothScrollGesture(
+      bool scroll_down, int pixels_to_scroll, int mouse_event_x,
+      int mouse_event_y) OVERRIDE;
+  virtual bool CanSubscribeFrame() const OVERRIDE;
+  virtual void BeginFrameSubscription(
+      scoped_ptr<RenderWidgetHostViewFrameSubscriber> subscriber) OVERRIDE;
+  virtual void EndFrameSubscription() OVERRIDE;
+  virtual void OnSwapCompositorFrame(
+      uint32 output_surface_id,
+      scoped_ptr<cc::CompositorFrame> frame) OVERRIDE {}
+  virtual void OnOverscrolled(gfx::Vector2dF accumulated_overscroll,
+                              gfx::Vector2dF current_fling_velocity) OVERRIDE;
+  virtual uint32 RendererFrameNumber() OVERRIDE;
+  virtual void DidReceiveRendererFrame() OVERRIDE;
+
+  void SetBrowserAccessibilityManager(BrowserAccessibilityManager* manager);
+
+  // Notification that a resize or move session ended on the native widget.
+  void UpdateScreenInfo(gfx::NativeView view);
+
+  // Tells if the display property (work area/scale factor) has
+  // changed since the last time.
+  bool HasDisplayPropertyChanged(gfx::NativeView view);
+
+#if defined(OS_WIN)
+  // The callback that DetachPluginsHelper calls for each child window. Call
+  // this directly if you want to do custom filtering on plugin windows first.
+  static void DetachPluginWindowsCallback(HWND window);
+#endif
+
+ protected:
+  // Interface class only, do not construct.
+  RenderWidgetHostViewBase();
+
+#if defined(OS_WIN)
+  // Shared implementation of MovePluginWindows for use by win and aura/wina.
+  static void MovePluginWindowsHelper(
+      HWND parent,
+      const std::vector<WebPluginGeometry>& moves);
+
+  static void PaintPluginWindowsHelper(
+      HWND parent,
+      const gfx::Rect& damaged_screen_rect);
+
+  // Needs to be called before the HWND backing the view goes away to avoid
+  // crashes in Windowed plugins.
+  static void DetachPluginsHelper(HWND parent);
+#endif
+
+  // Whether this view is a popup and what kind of popup it is (select,
+  // autofill...).
+  WebKit::WebPopupType popup_type_;
+
+  // A custom background to paint behind the web content. This will be tiled
+  // horizontally. Can be null, in which case we fall back to painting white.
+  SkBitmap background_;
+
+  // While the mouse is locked, the cursor is hidden from the user. Mouse events
+  // are still generated. However, the position they report is the last known
+  // mouse position just as mouse lock was entered; the movement they report
+  // indicates what the change in position of the mouse would be had it not been
+  // locked.
+  bool mouse_locked_;
+
+  // Whether we are showing a context menu.
+  bool showing_context_menu_;
+
+  // A buffer containing the text inside and around the current selection range.
+  string16 selection_text_;
+
+  // The offset of the text stored in |selection_text_| relative to the start of
+  // the web page.
+  size_t selection_text_offset_;
+
+  // The current selection range relative to the start of the web page.
+  ui::Range selection_range_;
+
+protected:
+  // The scale factor of the display the renderer is currently on.
+  float current_device_scale_factor_;
+
+ private:
+  // Manager of the tree representation of the WebKit render tree.
+  scoped_ptr<BrowserAccessibilityManager> browser_accessibility_manager_;
+
+  gfx::Rect current_display_area_;
+
+  uint32 renderer_frame_number_;
+
+  DISALLOW_COPY_AND_ASSIGN(RenderWidgetHostViewBase);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_BASE_H_