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

content/browser/android/content_view_core_impl.cc

 // Copyright 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.
 
 #include "content/browser/android/content_view_core_impl.h"
 
 #include "base/android/jni_android.h"
 #include "base/android/jni_array.h"
 #include "base/android/jni_string.h"
 #include "base/android/scoped_java_ref.h"
@@ skipping 673 matching lines @@
   ScopedJavaLocalRef<jobject> obj = java_ref_.get(env);
   if (obj.is_null())
     return;
   Java_ContentViewCore_showPastePopup(env, obj.obj(),
                                       static_cast<jint>(x_dip),
                                       static_cast<jint>(y_dip));
 }
 
 void ContentViewCoreImpl::GetScaledContentBitmap(
     float scale,
+    gfx::Rect src_subrect,
     gfx::Size* out_size,
     const base::Callback<void(bool, const SkBitmap&)>& result_callback) {
   RenderWidgetHostViewAndroid* view = GetRenderWidgetHostViewAndroid();
   if (!view) {
     result_callback.Run(false, SkBitmap());
     return;
   }
 
-  view->GetScaledContentBitmap(scale, out_size, result_callback);
+  view->GetScaledContentBitmap(scale, src_subrect, out_size, result_callback);
 }
 
 void ContentViewCoreImpl::StartContentIntent(const GURL& content_url) {
   JNIEnv* env = AttachCurrentThread();
   ScopedJavaLocalRef<jobject> j_obj = java_ref_.get(env);
   if (j_obj.is_null())
     return;
   ScopedJavaLocalRef<jstring> jcontent_url =
       ConvertUTF8ToJavaString(env, content_url.spec());
   Java_ContentViewCore_startContentIntent(env,
@@ skipping 1156 matching lines @@
       reinterpret_cast<ui::ViewAndroid*>(view_android),
       reinterpret_cast<ui::WindowAndroid*>(window_android));
   return reinterpret_cast<intptr_t>(view);
 }
 
 bool RegisterContentViewCore(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }
 
 }  // namespace content