[Mac] Hover/Pressed background for the Omnibox decorations

chrome/browser/ui/cocoa/location_bar/bubble_decoration.h

 // Copyright (c) 2011 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_COCOA_LOCATION_BAR_BUBBLE_DECORATION_H_
 #define CHROME_BROWSER_UI_COCOA_LOCATION_BAR_BUBBLE_DECORATION_H_
 
 #import <Cocoa/Cocoa.h>
 
 #include "base/gtest_prod_util.h"
@@ skipping 15 matching lines @@
   virtual NSColor* GetBackgroundBorderColor() = 0;
   void SetImage(NSImage* image);
   void SetLabel(NSString* label);
   void SetTextColor(NSColor* text_color);
   void SetFont(NSFont* font);
   void SetRetinaBaselineOffset(CGFloat offset);
   virtual ui::NinePartImageIds GetBubbleImageIds() = 0;
 
   // Implement |LocationBarDecoration|.
   CGFloat GetWidthForSpace(CGFloat width) override;
+  NSRect GetBackgroundFrame(NSRect frame) override;
   void DrawInFrame(NSRect frame, NSView* control_view) override;
   NSFont* GetFont() const override;
 
  protected:
   // Returns the amount of padding between the divider and the omnibox text.
   // Returns 0 in non-MD since there's no divider.
   CGFloat DividerPadding() const;
 
   // Helper returning bubble width for the given |image| and |label|
   // assuming |font_| (for sizing text).  Arguments can be nil.
@@ skipping 20 matching lines @@
   FRIEND_TEST_ALL_PREFIXES(SelectedKeywordDecorationTest,
                            UsesPartialKeywordIfNarrow);
 
   // Contains any Retina-only baseline adjustment for |label_|.
   CGFloat retina_baseline_offset_;
 
   DISALLOW_COPY_AND_ASSIGN(BubbleDecoration);
 };
 
 #endif  // CHROME_BROWSER_UI_COCOA_LOCATION_BAR_BUBBLE_DECORATION_H_