Changed Blimp client to start with white screen before drawing contents

blimp/client/app/android/blimp_view.h

Index: blimp/client/app/android/blimp_view.h
diff --git a/blimp/client/app/android/blimp_view.h b/blimp/client/app/android/blimp_view.h
index 4e01934ec942c216af2f1d1faaf8354166cf89b3..7c5e1593bbbf0580b79b73915c1c1812eb6724e9 100644
--- a/blimp/client/app/android/blimp_view.h
+++ b/blimp/client/app/android/blimp_view.h
@@ -9,6 +9,7 @@
 
 #include "base/android/jni_android.h"
 #include "base/macros.h"
+#include "blimp/client/app/android/blimp_compositor_manager_android.h"
 #include "ui/gfx/native_widget_types.h"
 
 namespace gfx {
@@ -18,13 +19,12 @@ class Size;
 namespace blimp {
 namespace client {
 
-class BlimpCompositorManagerAndroid;
 class RenderWidgetFeature;
 
 // The native component of org.chromium.blimp.BlimpView.  This builds and
 // maintains a BlimpCompositorAndroid and handles notifying the compositor of
 // SurfaceView surface changes (size, creation, destruction, etc.).
-class BlimpView {
+class BlimpView : public BlimpCompositorManagerClient {
  public:
   static bool RegisterJni(JNIEnv* env);
 
@@ -92,6 +92,9 @@ class BlimpView {
 
   void ReleaseAcceleratedWidget();
 
+  // BlimpCompositorManagerClient implementation.
+  void OnSwapBuffersCompleted() override;
+
   // Reference to the Java object which owns this class.
   base::android::ScopedJavaGlobalRef<jobject> java_obj_;