[Android] Expose method for UI to force composites

content/browser/android/content_view_render_view.cc

Index: content/browser/android/content_view_render_view.cc
diff --git a/content/browser/android/content_view_render_view.cc b/content/browser/android/content_view_render_view.cc
index 06590fa7513c75d2319d10ff27c163cab691f560..c72c706b11ae75cf4e17881578b1f6bc3741eb7a 100644
--- a/content/browser/android/content_view_render_view.cc
+++ b/content/browser/android/content_view_render_view.cc
@@ -120,6 +120,11 @@ void ContentViewRenderView::SurfaceChanged(JNIEnv* env, jobject obj,
 void ContentViewRenderView::SetOverlayVideoMode(
     JNIEnv* env, jobject obj, bool enabled) {
   compositor_->SetHasTransparentBackground(enabled);
+  SetNeedsComposite(env, obj);

[Ted C, 2014/08/23 00:47:11]

was this missing from before?

[no sievers, 2014/08/25 17:20:42]

am also wondering why this is needed

[David Trainor- moved to gerrit, 2014/08/25 17:30:05]

I saw we had this in CompositorView and assumed us not having it here was a bug.
 SetHasTransparentBackground doesn't seem to trigger any invalidate on the
LayerTreeHost, so I assumed that was why we had it in CompositorView downstream.

If you would like I can remove it until we see if it is an issue.  I imagine
frames from the renderer probably hide any bugs missing this might cause.

+}
+
+void ContentViewRenderView::SetNeedsComposite(JNIEnv* env, jobject obj) {
+  compositor_->SetNeedsComposite();
 }
 
 void ContentViewRenderView::Layout() {