1 files changed, 147 insertions, 0 deletions
diff --git a/chromium/content/browser/resources/gpu/browser_bridge.js b/chromium/content/browser/resources/gpu/browser_bridge.js
new file mode 100644
index 00000000000..cb4133a3398
--- /dev/null
+++ b/chromium/content/browser/resources/gpu/browser_bridge.js
@@ -0,0 +1,147 @@
+// Copyright (c) 2011 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.
+cr.define('gpu', function() {
+  /**
+   * This class provides a 'bridge' for communicating between javascript and the
+   * browser. When run outside of WebUI, e.g. as a regular webpage, it provides
+   * synthetic data to assist in testing.
+   * @constructor
+   */
+  function BrowserBridge() {
+    // If we are not running inside WebUI, output chrome.send messages
+    // to the console to help with quick-iteration debugging.
+    this.debugMode_ = (chrome.send === undefined && console.log);
+    if (this.debugMode_) {
+      var browserBridgeTests = document.createElement('script');
+      browserBridgeTests.src = './gpu_internals/browser_bridge_tests.js';
+      document.body.appendChild(browserBridgeTests);
+    }
+
+    this.nextRequestId_ = 0;
+    this.pendingCallbacks_ = [];
+    this.logMessages_ = [];
+
+    // Tell c++ code that we are ready to receive GPU Info.
+    if (!this.debugMode_) {
+      chrome.send('browserBridgeInitialized');
+      this.beginRequestClientInfo_();
+      this.beginRequestLogMessages_();
+    }
+  }
+
+  BrowserBridge.prototype = {
+    __proto__: cr.EventTarget.prototype,
+
+    applySimulatedData_: function applySimulatedData(data) {
+      // set up things according to the simulated data
+      this.gpuInfo_ = data.gpuInfo;
+      this.clientInfo_ = data.clientInfo;
+      this.logMessages_ = data.logMessages;
+      cr.dispatchSimpleEvent(this, 'gpuInfoUpdate');
+      cr.dispatchSimpleEvent(this, 'clientInfoChange');
+      cr.dispatchSimpleEvent(this, 'logMessagesChange');
+    },
+
+    /**
+     * Returns true if the page is hosted inside Chrome WebUI
+     * Helps have behavior conditional to emulate_webui.py
+     */
+    get debugMode() {
+      return this.debugMode_;
+    },
+
+    /**
+     * Sends a message to the browser with specified args. The
+     * browser will reply asynchronously via the provided callback.
+     */
+    callAsync: function(submessage, args, callback) {
+      var requestId = this.nextRequestId_;
+      this.nextRequestId_ += 1;
+      this.pendingCallbacks_[requestId] = callback;
+      if (!args) {
+        chrome.send('callAsync', [requestId.toString(), submessage]);
+      } else {
+        var allArgs = [requestId.toString(), submessage].concat(args);
+        chrome.send('callAsync', allArgs);
+      }
+    },
+
+    /**
+     * Called by gpu c++ code when client info is ready.
+     */
+    onCallAsyncReply: function(requestId, args) {
+      if (this.pendingCallbacks_[requestId] === undefined) {
+        throw new Error('requestId ' + requestId + ' is not pending');
+      }
+      var callback = this.pendingCallbacks_[requestId];
+      callback(args);
+      delete this.pendingCallbacks_[requestId];
+    },
+
+    /**
+     * Get gpuInfo data.
+     */
+    get gpuInfo() {
+      return this.gpuInfo_;
+    },
+
+    /**
+     * Called from gpu c++ code when GPU Info is updated.
+     */
+    onGpuInfoUpdate: function(gpuInfo) {
+      this.gpuInfo_ = gpuInfo;
+      cr.dispatchSimpleEvent(this, 'gpuInfoUpdate');
+    },
+
+    /**
+     * This function begins a request for the ClientInfo. If it comes back
+     * as undefined, then we will issue the request again in 250ms.
+     */
+    beginRequestClientInfo_: function() {
+      this.callAsync('requestClientInfo', undefined, (function(data) {
+        if (data === undefined) { // try again in 250 ms
+          window.setTimeout(this.beginRequestClientInfo_.bind(this), 250);
+        } else {
+          this.clientInfo_ = data;
+          cr.dispatchSimpleEvent(this, 'clientInfoChange');
+        }
+      }).bind(this));
+    },
+
+    /**
+     * Returns information about the currently running Chrome build.
+     */
+    get clientInfo() {
+      return this.clientInfo_;
+    },
+
+    /**
+     * This function checks for new GPU_LOG messages.
+     * If any are found, a refresh is triggered.
+     */
+    beginRequestLogMessages_: function() {
+      this.callAsync('requestLogMessages', undefined,
+          (function(messages) {
+            if (messages.length != this.logMessages_.length) {
+              this.logMessages_ = messages;
+              cr.dispatchSimpleEvent(this, 'logMessagesChange');
+            }
+            // check again in 250 ms
+            window.setTimeout(this.beginRequestLogMessages_.bind(this), 250);
+          }).bind(this));
+    },
+
+    /**
+     * Returns an array of log messages issued by the GPU process, if any.
+     */
+    get logMessages() {
+      return this.logMessages_;
+    },
+
+  };
+
+  return {
+    BrowserBridge: BrowserBridge
+  };
+});