Add scheme to HostZoomMap

chrome/browser/ui/cocoa/wrench_menu/wrench_menu_controller.mm

 // 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.
 
 #import "chrome/browser/ui/cocoa/wrench_menu/wrench_menu_controller.h"
 
 #include "base/basictypes.h"
 #include "base/mac/bundle_locations.h"
 #include "base/mac/mac_util.h"
 #include "base/string16.h"
@@ skipping 57 matching lines @@
         controller_(controller),
         map_(map) {
     map_->AddZoomLevelChangedCallback(callback_);
   }
 
   ~ZoomLevelObserver() {
     map_->RemoveZoomLevelChangedCallback(callback_);
   }
 
  private:
-  void OnZoomLevelChanged(const std::string& host) {
+  void OnZoomLevelChanged(const HostZoomMap::ZoomLevelChange& change) {
     WrenchMenuModel* wrenchMenuModel = [controller_ wrenchMenuModel];
     wrenchMenuModel->UpdateZoomControls();
     const string16 level =
         wrenchMenuModel->GetLabelForCommandId(IDC_ZOOM_PERCENT_DISPLAY);
     [[controller_ zoomDisplay] setTitle:SysUTF16ToNSString(level)];
   }
 
   content::HostZoomMap::ZoomLevelChangedCallback callback_;
 
   WrenchMenuController* controller_;  // Weak; owns this.
@@ skipping 267 matching lines @@
     controller_ = controller;
   }
   return self;
 }
 
 - (IBAction)dispatchWrenchMenuCommand:(id)sender {
   [controller_ dispatchWrenchMenuCommand:sender];
 }
 
 @end  // @implementation WrenchMenuButtonViewController