Revert of Sets the default background color of inline signin and user manager to grey

content/browser/frame_host/render_widget_host_view_child_frame.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_BROWSER_FRAME_HOST_RENDER_WIDGET_HOST_VIEW_CHILD_FRAME_H_
 #define CONTENT_BROWSER_FRAME_HOST_RENDER_WIDGET_HOST_VIEW_CHILD_FRAME_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "content/browser/renderer_host/render_widget_host_view_base.h"
 #include "content/common/content_export.h"
@@ skipping 35 matching lines @@
   virtual bool HasFocus() const override;
   virtual bool IsSurfaceAvailableForCopy() const override;
   virtual void Show() override;
   virtual void Hide() override;
   virtual bool IsShowing() override;
   virtual gfx::Rect GetViewBounds() const override;
   virtual gfx::Vector2dF GetLastScrollOffset() const override;
   virtual gfx::NativeView GetNativeView() const override;
   virtual gfx::NativeViewId GetNativeViewId() const override;
   virtual gfx::NativeViewAccessible GetNativeViewAccessible() override;
-  virtual void SetBackgroundColor(SkColor color) override;
+  virtual void SetBackgroundOpaque(bool opaque) override;
   virtual gfx::Size GetPhysicalBackingSize() const override;
 
   // RenderWidgetHostViewBase implementation.
   virtual void InitAsPopup(RenderWidgetHostView* parent_host_view,
                            const gfx::Rect& pos) override;
   virtual void InitAsFullscreen(
       RenderWidgetHostView* reference_host_view) override;
   virtual void WasShown() override;
   virtual void WasHidden() override;
   virtual void MovePluginWindows(
@@ skipping 90 matching lines @@
   // sent through it are routed to the embedding renderer process.
   CrossProcessFrameConnector* frame_connector_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(RenderWidgetHostViewChildFrame);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_FRAME_HOST_RENDER_WIDGET_HOST_VIEW_CHILD_FRAME_H_