Adds handling of clicking on the omnibox search/go button.

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

 // Copyright 2013 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_SEARCH_BUTTON_DECORATION_H_
 #define CHROME_BROWSER_UI_COCOA_LOCATION_BAR_SEARCH_BUTTON_DECORATION_H_
 
 #import <Cocoa/Cocoa.h>
 
 #include "chrome/browser/ui/cocoa/location_bar/button_decoration.h"
 
+class LocationBarViewMac;
+
 // |SearchButtonDecoration| adds a search/go button to the right of the omnibox.
 
 class SearchButtonDecoration : public ButtonDecoration {
  public:
-  SearchButtonDecoration();
+  explicit SearchButtonDecoration(LocationBarViewMac* owner);
   virtual ~SearchButtonDecoration();
 
   // Implement |LocationBarDecoration|.
   virtual CGFloat GetWidthForSpace(CGFloat width) OVERRIDE;
   virtual void DrawInFrame(NSRect frame, NSView* control_view) OVERRIDE;
   virtual bool OnMousePressed(NSRect frame) OVERRIDE;
 
  private:
+  // The control view that owns this. Weak.
+  LocationBarViewMac* owner_;
+
   DISALLOW_COPY_AND_ASSIGN(SearchButtonDecoration);
 };
 
 #endif  // CHROME_BROWSER_UI_COCOA_LOCATION_BAR_SEARCH_BUTTON_DECORATION_H_