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

content/browser/renderer_host/render_widget_host_view_mac.mm

Index: content/browser/renderer_host/render_widget_host_view_mac.mm
diff --git a/content/browser/renderer_host/render_widget_host_view_mac.mm b/content/browser/renderer_host/render_widget_host_view_mac.mm
index 2e89069f8921a6a50058307ebd33f37c9f5ea571..3adc7094548426fd54da4b1a55d7e23791a851f6 100644
--- a/content/browser/renderer_host/render_widget_host_view_mac.mm
+++ b/content/browser/renderer_host/render_widget_host_view_mac.mm
@@ -2027,11 +2027,11 @@ void RenderWidgetHostViewMac::ShowDefinitionForSelection() {
   helper.ShowDefinitionForSelection();
 }
 
-void RenderWidgetHostViewMac::SetBackground(const SkBitmap& background) {
-  RenderWidgetHostViewBase::SetBackground(background);
+void RenderWidgetHostViewMac::SetBackgroundOpaque(bool opaque) {
+  RenderWidgetHostViewBase::SetBackgroundOpaque(opaque);
   if (render_widget_host_)
-    render_widget_host_->Send(new ViewMsg_SetBackground(
-        render_widget_host_->GetRoutingID(), background));
+    render_widget_host_->Send(new ViewMsg_SetBackgroundOpaque(

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

nit: same here, render_widget_host_->SetBackgroundOpaque(opaque); ?

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

Done.

+        render_widget_host_->GetRoutingID(), opaque));
 }
 
 void RenderWidgetHostViewMac::CreateBrowserAccessibilityManagerIfNeeded() {