Migrate HostZoomMap to live in StoragePartition.

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/strings/string16.h"
@@ skipping 85 matching lines @@
 };
 
 }  // namespace WrenchMenuControllerInternal
 
 @implementation WrenchMenuController
 
 - (id)initWithBrowser:(Browser*)browser {
   if ((self = [super init])) {
     browser_ = browser;
     observer_.reset(new WrenchMenuControllerInternal::ZoomLevelObserver(
-        self, content::HostZoomMap::GetForBrowserContext(browser->profile())));
+        self,
+        content::HostZoomMap::GetDefaultForBrowserContext(browser->profile())));
     acceleratorDelegate_.reset(
         new WrenchMenuControllerInternal::AcceleratorDelegate());
     [self createModel];
   }
   return self;
 }
 
 - (void)addItemToMenu:(NSMenu*)menu
               atIndex:(NSInteger)index
             fromModel:(ui::MenuModel*)model {
@@ skipping 292 matching lines @@
     controller_ = controller;
   }
   return self;
 }
 
 - (IBAction)dispatchWrenchMenuCommand:(id)sender {
   [controller_ dispatchWrenchMenuCommand:sender];
 }
 
 @end  // @implementation WrenchMenuButtonViewController