chrome/browser should build on the x86_64 architecture

chrome/browser/ui/cocoa/about_ipc_controller.mm

 // Copyright (c) 2009 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 "base/logging.h"
 #include "base/mac/bundle_locations.h"
 #include "base/mac/mac_util.h"
 #include "base/string_util.h"
 #include "base/sys_string_conversions.h"
 #include "base/time.h"
@@ skipping 167 matching lines @@
 - (void)log:(CocoaLogData*)data {
   if ([self filterOut:data]) {
     [filteredEventCount_ setStringValue:[NSString stringWithFormat:@"%d",
                                                   ++filteredEventCounter_]];
     return;
   }
   [dataController_ addObject:data];
   NSUInteger count = [[dataController_ arrangedObjects] count];
   // Uncomment if you want scroll-to-end behavior... but seems expensive.
   // [tableView_ scrollRowToVisible:count-1];
-  [eventCount_ setStringValue:[NSString stringWithFormat:@"%d", count]];
+  [eventCount_ setStringValue:[NSString stringWithFormat:@"%ld",
+                               static_cast<long>(count)]];
 }
 
 - (void)setDisplayViewMessages:(BOOL)display {
   view_ = display;
 }
 
 @end
 
 #endif  // IPC_MESSAGE_LOG_ENABLED