Refactor and send voice interaction structure

content/browser/web_contents/web_contents_impl.h

 // 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_WEB_CONTENTS_WEB_CONTENTS_IMPL_H_
 #define CONTENT_BROWSER_WEB_CONTENTS_WEB_CONTENTS_IMPL_H_
 
 #include <stdint.h>
 
 #include <functional>
@@ skipping 219 matching lines @@
 
   // Broadcasts the mode change to all frames.
   void SetAccessibilityMode(AccessibilityMode mode);
 
   // Adds the given accessibility mode to the current accessibility mode
   // bitmap.
   void AddAccessibilityMode(AccessibilityMode mode);
 
   // Request a one-time snapshot of the accessibility tree without changing
   // the accessibility mode.
-  using AXTreeSnapshotCallback =
-      base::Callback<void(
-          const ui::AXTreeUpdate&)>;
-  void RequestAXTreeSnapshot(AXTreeSnapshotCallback callback);
+  void RequestAXTreeSnapshot(AXTreeSnapshotCallback callback) override;

[Avi (use Gerrit), 2017/04/14 14:45:05]

You'll need to move this to the block of overriding methods, to line 309. (Keep
the same order for the methods as in web_contents.h).

[Muyuan, 2017/04/18 18:24:51]

Done.

 
   // Set a temporary zoom level for the frames associated with this WebContents.
   // If |is_temporary| is true, we are setting a new temporary zoom level,
   // otherwise we are clearing a previously set temporary zoom level.
   void SetTemporaryZoomLevel(double level, bool temporary_zoom_enabled);
 
   // Sets the zoom level for frames associated with this WebContents.
   void UpdateZoom(double level);
 
   // Sets the zoom level for frames associated with this WebContents if it
@@ skipping 1338 matching lines @@
   // Adds/removes a callback called on creation of each new WebContents.
   static void AddCreatedCallbackForTesting(const CreatedCallback& callback);
   static void RemoveCreatedCallbackForTesting(const CreatedCallback& callback);
 
   DISALLOW_COPY_AND_ASSIGN(FriendWrapper);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_WEB_CONTENTS_WEB_CONTENTS_IMPL_H_