Updates Zoom bubble layout and adds +/- buttons

chrome/browser/ui/location_bar/location_bar.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 CHROME_BROWSER_UI_LOCATION_BAR_LOCATION_BAR_H_
 #define CHROME_BROWSER_UI_LOCATION_BAR_LOCATION_BAR_H_
 
 #include <stddef.h>
 
 #include "base/macros.h"
@@ skipping 40 matching lines @@
 
   // Updates the password icon and pops up a bubble from the icon if needed.
   virtual void UpdateManagePasswordsIconAndBubble() = 0;
 
   // Updates the visibility and toggled state of the save credit card icon.
   virtual void UpdateSaveCreditCardIcon() = 0;
 
   // Updates the visibility of the bookmark star.
   virtual void UpdateBookmarkStarVisibility() = 0;
 
+  // Updates the visibility of the zoom icon.
+  virtual void UpdateZoomViewVisibility() = 0;
+
   // Updates the visibility of the location bar. Animates the transition if
   // |animate| is true.
   virtual void UpdateLocationBarVisibility(bool visible, bool animate) = 0;
 
   // Saves the state of the location bar to the specified WebContents, so that
   // it can be restored later. (Done when switching tabs).
   virtual void SaveStateToContents(content::WebContents* contents) = 0;
 
   // Reverts the location bar.  The bar's permanent text will be shown.
   virtual void Revert() = 0;
@@ skipping 35 matching lines @@
 
   // Invokes the content setting image at |index|, displaying the bubble.
   // Returns false if there is none.
   virtual bool TestContentSettingImagePressed(size_t index) = 0;
 
  protected:
   virtual ~LocationBarTesting() {}
 };
 
 #endif  // CHROME_BROWSER_UI_LOCATION_BAR_LOCATION_BAR_H_