Revert of [android] Make RWHVAndroid a BeginFrameObserver.

ui/android/delegated_frame_host_android.h

Index: ui/android/delegated_frame_host_android.h
diff --git a/ui/android/delegated_frame_host_android.h b/ui/android/delegated_frame_host_android.h
index 977f03b053d977efb1bdf03e0d9f8bf71d90c6a5..77479e22c3593e967ad7576ff7f17fb902e10e3a 100644
--- a/ui/android/delegated_frame_host_android.h
+++ b/ui/android/delegated_frame_host_android.h
@@ -32,16 +32,12 @@
 class UI_ANDROID_EXPORT DelegatedFrameHostAndroid
     : public cc::SurfaceFactoryClient {
  public:
-  class Client {
-   public:
-    virtual void SetBeginFrameSource(
-        cc::BeginFrameSource* begin_frame_source) = 0;
-    virtual void ReturnResources(const cc::ReturnedResourceArray&) = 0;
-  };
+  using ReturnResourcesCallback =
+      base::Callback<void(const cc::ReturnedResourceArray&)>;
 
   DelegatedFrameHostAndroid(ViewAndroid* view,
                             SkColor background_color,
-                            Client* client);
+                            ReturnResourcesCallback return_resources_callback);
 
   ~DelegatedFrameHostAndroid() override;
 
@@ -85,7 +81,7 @@
   cc::SurfaceManager* surface_manager_;
   std::unique_ptr<cc::SurfaceIdAllocator> surface_id_allocator_;
   cc::FrameSinkId registered_parent_frame_sink_id_;
-  Client* client_;
+  ReturnResourcesCallback return_resources_callback_;
 
   std::unique_ptr<cc::SurfaceFactory> surface_factory_;