Update some uses of UTF conversions in chrome/browser to use the base:: namespace.

chrome/browser/ui/browser.cc

 // Copyright 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/browser.h"
 
 #if defined(OS_WIN)
 #include <windows.h>
 #include <shellapi.h>
 #endif  // defined(OS_WIN)
@@ skipping 2238 matching lines @@
   extensions::ProcessMap* process_map = extensions_service->process_map();
   if (!opener_site_instance->GetProcess() ||
       !process_map->Contains(
           extension->id(), opener_site_instance->GetProcess()->GetID())) {
     return false;
   }
 
   // Only allow a single background contents per app.
   bool allow_js_access = extensions::BackgroundInfo::AllowJSAccess(extension);
   BackgroundContents* existing =
-      service->GetAppBackgroundContents(ASCIIToUTF16(extension->id()));
+      service->GetAppBackgroundContents(base::ASCIIToUTF16(extension->id()));
   if (existing) {
     // For non-scriptable background contents, ignore the request altogether,
     // (returning true, so that a regular WebContents isn't created either).
     if (!allow_js_access)
       return true;
     // For scriptable background pages, if one already exists, close it (even
     // if it was specified in the manifest).
     delete existing;
   }
 
   // If script access is not allowed, create the the background contents in a
   // new SiteInstance, so that a separate process is used.
   scoped_refptr<content::SiteInstance> site_instance =
       allow_js_access ?
       opener_site_instance :
       content::SiteInstance::Create(opener_web_contents->GetBrowserContext());
 
   // Passed all the checks, so this should be created as a BackgroundContents.
   BackgroundContents* contents =
       service->CreateBackgroundContents(site_instance.get(),
                                         route_id,
                                         profile_,
                                         frame_name,
-                                        ASCIIToUTF16(extension->id()),
+                                        base::ASCIIToUTF16(extension->id()),
                                         partition_id,
                                         session_storage_namespace);
 
   // When a separate process is used, the original renderer cannot access the
   // new window later, thus we need to navigate the window now.
   if (contents && !allow_js_access) {
     contents->web_contents()->GetController().LoadURL(
         target_url,
         content::Referrer(),
         content::PAGE_TRANSITION_LINK,
         std::string());  // No extra headers.
   }
 
   return contents != NULL;
 }