Adds support for capturing a sub rect of the compositing surface.

content/public/browser/android/content_view_core.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_PUBLIC_BROWSER_ANDROID_CONTENT_VIEW_CORE_H_
 #define CONTENT_PUBLIC_BROWSER_ANDROID_CONTENT_VIEW_CORE_H_
 
 #include <jni.h>
 
 #include "base/android/scoped_java_ref.h"
 #include "base/callback.h"
 #include "content/common/content_export.h"
 #include "content/public/browser/navigation_controller.h"
+#include "ui/gfx/rect.h"
 
 class SkBitmap;
 
 namespace cc {
 class Layer;
 }
 
 namespace gfx {
 class Size;
 class SizeF;
@@ skipping 26 matching lines @@
   virtual jint GetCurrentRenderProcessId(JNIEnv* env, jobject obj) = 0;
   virtual void ShowPastePopup(int x, int y) = 0;
 
   // Request a scaled content readback.  The result is passed through the
   // callback.  The boolean parameter indicates whether the readback was a
   // success or not.  The content is passed through the SkBitmap parameter.
   // |out_size| is returned with the size of the content.
   virtual void GetScaledContentBitmap(
       float scale,
       jobject bitmap_config,
+      gfx::Rect src_rect,
       const base::Callback<void(bool, const SkBitmap&)>& result_callback) = 0;
   virtual float GetDpiScale() const = 0;
   virtual void PauseVideo() = 0;
   virtual void PauseOrResumeGeolocation(bool should_pause) = 0;
 
   // Observer callback for frame metadata updates.
   typedef base::Callback<void(
       const gfx::SizeF& content_size,
       const gfx::Vector2dF& scroll_offset,
       float page_scale_factor)> UpdateFrameInfoCallback;
 
  protected:
   virtual ~ContentViewCore() {};
 };
 
 };  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_ANDROID_CONTENT_VIEW_CORE_H_