Enhance chrome.app.window API with window background color

content/browser/renderer_host/render_widget_host_impl.h

Index: content/browser/renderer_host/render_widget_host_impl.h
diff --git a/content/browser/renderer_host/render_widget_host_impl.h b/content/browser/renderer_host/render_widget_host_impl.h
index b6aa99ec6f3c4147adec40a795432f45b41385ef..10c7cb9d97e22cfd2d8b5862a223dd42160faa5e 100644
--- a/content/browser/renderer_host/render_widget_host_impl.h
+++ b/content/browser/renderer_host/render_widget_host_impl.h
@@ -433,6 +433,9 @@ class CONTENT_EXPORT RenderWidgetHostImpl : public RenderWidgetHost,
   // Set the RenderView background transparency.
   void SetBackgroundOpaque(bool opaque);
 
+  // Set background color.
+  void SetBaseBackgroundColor(SkColor);
+
   // Executes the edit command.
   void ExecuteEditCommand(const std::string& command,
                           const std::string& value);