chrome/browser should build on the x86_64 architecture

chrome/browser/ui/cocoa/history_menu_bridge.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.
 
 #include "chrome/browser/ui/cocoa/history_menu_bridge.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/stl_util.h"
 #include "base/string_number_conversions.h"
@@ skipping 453 matching lines @@
 void HistoryMenuBridge::GotFaviconData(FaviconService::Handle handle,
                                        history::FaviconData favicon) {
   // Since we're going to do Cocoa-y things, make sure this is the main thread.
   DCHECK([NSThread isMainThread]);
 
   HistoryItem* item =
       favicon_consumer_.GetClientData(
           profile_->GetFaviconService(Profile::EXPLICIT_ACCESS), handle);
   DCHECK(item);
   item->icon_requested = false;
-  item->icon_handle = NULL;
+  item->icon_handle = 0;
 
   // Convert the raw data to Skia and then to a NSImage.
   // TODO(rsesek): Is there an easier way to do this?
   SkBitmap icon;
   if (favicon.is_valid() &&
       gfx::PNGCodec::Decode(favicon.image_data->front(),
           favicon.image_data->size(), &icon)) {
     NSImage* image = gfx::SkBitmapToNSImage(icon);
     if (image) {
       // The conversion was successful.
       item->icon.reset([image retain]);
       [item->menu_item setImage:item->icon.get()];
     }
   }
 }
 
 void HistoryMenuBridge::CancelFaviconRequest(HistoryItem* item) {
   DCHECK(item);
   if (item->icon_requested) {
     FaviconService* service =
         profile_->GetFaviconService(Profile::EXPLICIT_ACCESS);
     service->CancelRequest(item->icon_handle);
     item->icon_requested = false;
-    item->icon_handle = NULL;
+    item->icon_handle = 0;
   }
 }