android: Fix inconsistent sizes in GetScaledContentBitmap

content/browser/renderer_host/render_widget_host_view_android.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_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_ANDROID_H_
 #define CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_ANDROID_H_
 
 #include <map>
 #include <queue>
 
@@ skipping 190 matching lines @@
 
   bool OnTouchEvent(const ui::MotionEvent& event);
   void ResetGestureDetection();
   void SetDoubleTapSupportEnabled(bool enabled);
   void SetMultiTouchZoomSupportEnabled(bool enabled);
 
   long GetNativeImeAdapter();
 
   void WasResized();
 
+  // Asynchronously retrieves a bitmap of the content.  |src_subrect| is in
+  // phyiscal pixel space before applying |scale|.
   void GetScaledContentBitmap(
       float scale,
       SkBitmap::Config bitmap_config,
       gfx::Rect src_subrect,
       const base::Callback<void(bool, const SkBitmap&)>& result_callback);
 
   bool HasValidFrame() const;
 
   void MoveCaret(const gfx::Point& point);
 
@@ skipping 130 matching lines @@
   };
 
   scoped_ptr<LastFrameInfo> last_frame_info_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderWidgetHostViewAndroid);
 };
 
 } // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_VIEW_ANDROID_H_