Remove RenderWidget::SetBackground, change IPC to pass a bool.

content/browser/renderer_host/render_widget_host_view_android.cc

Index: content/browser/renderer_host/render_widget_host_view_android.cc
diff --git a/content/browser/renderer_host/render_widget_host_view_android.cc b/content/browser/renderer_host/render_widget_host_view_android.cc
index b3aad6a1b0b219c7608b4c8b07ffc6d6ec5b7ebd..39eaa2331b2cba843ed090a2d688dcb7d6183d1a 100644
--- a/content/browser/renderer_host/render_widget_host_view_android.cc
+++ b/content/browser/renderer_host/render_widget_host_view_android.cc
@@ -668,9 +668,9 @@ void RenderWidgetHostViewAndroid::SelectionRootBoundsChanged(
 void RenderWidgetHostViewAndroid::ScrollOffsetChanged() {
 }
 
-void RenderWidgetHostViewAndroid::SetBackground(const SkBitmap& background) {
-  RenderWidgetHostViewBase::SetBackground(background);
-  host_->Send(new ViewMsg_SetBackground(host_->GetRoutingID(), background));
+void RenderWidgetHostViewAndroid::SetBackgroundOpaque(bool opaque) {
+  RenderWidgetHostViewBase::SetBackgroundOpaque(opaque);
+  host_->Send(new ViewMsg_SetBackgroundOpaque(host_->GetRoutingID(), opaque));

[piman, 2014/05/07 00:29:56]

nit: host_->SetBackgroundOpaque(opaque) ? That way there is a single sender of
this message.

[danakj, 2014/05/07 17:08:17]

Done.

 }
 
 void RenderWidgetHostViewAndroid::CopyFromCompositingSurface(