Add base:: namespace to straggling string16s left in chrome/browser/ui.

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 1135 matching lines @@
     return fast_unload_controller_->TabsNeedBeforeUnloadFired();
   return unload_controller_->TabsNeedBeforeUnloadFired();
 }
 
 void Browser::OverscrollUpdate(int delta_y) {
   window_->OverscrollUpdate(delta_y);
 }
 
 void Browser::ShowValidationMessage(content::WebContents* web_contents,
                                     const gfx::Rect& anchor_in_root_view,
-                                    const string16& main_text,
-                                    const string16& sub_text) {
+                                    const base::string16& main_text,
+                                    const base::string16& sub_text) {
   RenderWidgetHostView* rwhv = web_contents->GetRenderWidgetHostView();
   if (rwhv) {
     validation_message_bubble_ =
         chrome::ValidationMessageBubble::CreateAndShow(
             rwhv->GetRenderWidgetHost(),
             anchor_in_root_view,
             main_text,
             sub_text);
   }
 }
@@ skipping 1122 matching lines @@
   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;
 }