Adding compositor callbacks to RenderWidgetHostViewAndroid

content/browser/renderer_host/compositor_impl_android.cc

Index: content/browser/renderer_host/compositor_impl_android.cc
diff --git a/content/browser/renderer_host/compositor_impl_android.cc b/content/browser/renderer_host/compositor_impl_android.cc
index 86acf38893b8afe0fd2eaf38a2c51fda43352c4a..a86e32fbc98af310c851ea37d7abc3266beb7cd8 100644
--- a/content/browser/renderer_host/compositor_impl_android.cc
+++ b/content/browser/renderer_host/compositor_impl_android.cc
@@ -34,6 +34,7 @@
 #include "content/common/gpu/client/webgraphicscontext3d_command_buffer_impl.h"
 #include "content/common/gpu/gpu_process_launch_causes.h"
 #include "content/public/browser/android/compositor_client.h"
+#include "content/public/browser/android/compositor_observer.h"
 #include "content/public/common/content_switches.h"
 #include "third_party/WebKit/public/platform/WebGraphicsContext3D.h"
 #include "third_party/khronos/GLES2/gl2.h"
@@ -481,4 +482,23 @@ blink::WGC3Denum CompositorImpl::GetGLTypeForBitmap(gfx::JavaBitmap& bitmap) {
   }
 }
 
+void CompositorImpl::AddObserver(CompositorObserver* observer) {
+  if (!HasObserver(observer))
+    observer_list_.AddObserver(observer);
+}
+
+void CompositorImpl::RemoveObserver(CompositorObserver* observer) {
+  observer_list_.RemoveObserver(observer);
+}
+
+bool CompositorImpl::HasObserver(CompositorObserver* observer) {
+  return observer_list_.HasObserver(observer);
+}
+
+void CompositorImpl::DidCommit() {
+  FOR_EACH_OBSERVER(CompositorObserver,
+                    observer_list_,
+                    OnCompositingDidCommit(this));
+}
+
 } // namespace content