Aura: Fix gray line at top of toolbar with translucent frames

chrome/browser/ui/views/frame/browser_non_client_frame_view_aura.h

 // Copyright (c) 2012 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 CHROME_BROWSER_UI_VIEWS_FRAME_BROWSER_NON_CLIENT_FRAME_VIEW_AURA_H_
 #define CHROME_BROWSER_UI_VIEWS_FRAME_BROWSER_NON_CLIENT_FRAME_VIEW_AURA_H_
 #pragma once
 
 #include "base/memory/scoped_ptr.h"
 #include "chrome/browser/ui/views/frame/browser_non_client_frame_view.h"
@@ skipping 48 matching lines @@
   void SetButtonImages(views::ImageButton* button,
                        int normal_bitmap_id,
                        int hot_bitmap_id,
                        int pushed_bitmap_id);
 
   // Distance between top of window and client area.
   int NonClientTopBorderHeight(bool restored) const;
 
   void PaintHeader(gfx::Canvas* canvas);
   void PaintTitleBar(gfx::Canvas* canvas);
+  void PaintToolbarBackground(gfx::Canvas* canvas);
 
   // Returns the correct bitmap for the frame header based on activation state
   // and incognito mode.
   SkBitmap* GetThemeFrameBitmap() const;
   SkBitmap* GetThemeFrameOverlayBitmap() const;
 
   // Returns the theme image bitmap for |bitmap_id| if the user has a custom
   // theme image, or the bitmap for |fallback_bitmap_id| if not.
   SkBitmap* GetCustomBitmap(int bitmap_id, int fallback_bitmap_id) const;
 
   // Window controls.
   views::ImageButton* maximize_button_;
   views::ImageButton* close_button_;
 
   // For popups, the window icon.
   TabIconView* window_icon_;
 
   // Window frame header/caption parts.
   SkBitmap* button_separator_;
   SkBitmap* top_left_corner_;
   SkBitmap* top_edge_;
   SkBitmap* top_right_corner_;
   SkBitmap* header_left_edge_;
   SkBitmap* header_right_edge_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserNonClientFrameViewAura);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_FRAME_BROWSER_NON_CLIENT_FRAME_VIEW_AURA_H_