Refactor browser window zoom handling and enable zoom icon on all platforms.

chrome/browser/ui/cocoa/toolbar/toolbar_controller.mm

 // 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.
 
 #import "chrome/browser/ui/cocoa/toolbar/toolbar_controller.h"
 
 #include <algorithm>
 
 #include "base/mac/bundle_locations.h"
 #include "base/mac/mac_util.h"
@@ skipping 425 matching lines @@
 
   if (browserActionsController_.get()) {
     [browserActionsController_ update];
   }
 }
 
 - (void)setStarredState:(BOOL)isStarred {
   locationBarView_->SetStarred(isStarred ? true : false);
 }
 
+- (void)zoomChangedForActiveTab:(BOOL)canShowBubble {
+  locationBarView_->ZoomChangedForActiveTab(canShowBubble ? true : false);
+}
+
 - (void)setIsLoading:(BOOL)isLoading force:(BOOL)force {
   [reloadButton_ setIsLoading:isLoading force:force];
 }
 
 - (void)setHasToolbar:(BOOL)toolbar hasLocationBar:(BOOL)locBar {
   [self view];  // Force nib loading.
 
   hasToolbar_ = toolbar;
 
   // If there's a toolbar, there must be a location bar.
@@ skipping 340 matching lines @@
 - (void)hideDropURLsIndicatorInView:(NSView*)view {
   // Do nothing.
 }
 
 // (URLDropTargetController protocol)
 - (BOOL)isUnsupportedDropData:(id<NSDraggingInfo>)info {
   return drag_util::IsUnsupportedDropData(profile_, info);
 }
 
 @end