chrome: Use stl utilities from the base namespace

chrome/browser/ui/cocoa/profiles/profile_chooser_controller.mm

 // Copyright 2014 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/profiles/profile_chooser_controller.h"
 
 #import <Carbon/Carbon.h>  // kVK_Return.
 #import <Cocoa/Cocoa.h>
 #include <stddef.h>
 
@@ skipping 1150 matching lines @@
 - (IBAction)showAccountRemovalView:(id)sender {
   DCHECK(!isGuestSession_);
 
   // Tag is either |kPrimaryProfileTag| for the primary account, or equal to the
   // index in |currentProfileAccounts_| for a secondary account.
   int tag = [sender tag];
   if (tag == kPrimaryProfileTag) {
     accountIdToRemove_ = SigninManagerFactory::GetForProfile(
         browser_->profile())->GetAuthenticatedAccountId();
   } else {
-    DCHECK(ContainsKey(currentProfileAccounts_, tag));
+    DCHECK(base::ContainsKey(currentProfileAccounts_, tag));
     accountIdToRemove_ = currentProfileAccounts_[tag];
   }
 
   [self initMenuContentsWithView:profiles::BUBBLE_VIEW_MODE_ACCOUNT_REMOVAL];
 }
 
 - (IBAction)showSignoutView:(id)sender {
   chrome::ShowSettingsSubPage(browser_, chrome::kSignOutSubPage);
 }
 
@@ skipping 1707 matching lines @@
 }
 
 - (bool)shouldShowGoIncognito {
   bool incognitoAvailable =
       IncognitoModePrefs::GetAvailability(browser_->profile()->GetPrefs()) !=
           IncognitoModePrefs::DISABLED;
   return incognitoAvailable && !browser_->profile()->IsGuestSession();
 }
 
 @end