Update uses of UTF conversions in content/ to use the base:: namespace.

content/browser/web_contents/web_contents_impl.cc

 // 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 "content/browser/web_contents/web_contents_impl.h"
 
 #include <utility>
 
 #include "base/command_line.h"
 #include "base/debug/trace_event.h"
@@ skipping 2691 matching lines @@
 }
 
 bool WebContentsImpl::UpdateTitleForEntry(NavigationEntryImpl* entry,
                                           const base::string16& title) {
   // For file URLs without a title, use the pathname instead. In the case of a
   // synthesized title, we don't want the update to count toward the "one set
   // per page of the title to history."
   base::string16 final_title;
   bool explicit_set;
   if (entry && entry->GetURL().SchemeIsFile() && title.empty()) {
-    final_title = UTF8ToUTF16(entry->GetURL().ExtractFileName());
+    final_title = base::UTF8ToUTF16(entry->GetURL().ExtractFileName());
     explicit_set = false;  // Don't count synthetic titles toward the set limit.
   } else {
     TrimWhitespace(title, TRIM_ALL, &final_title);
     explicit_set = true;
   }
 
   // If a page is created via window.open and never navigated,
   // there will be no navigation entry. In this situation,
   // |page_title_when_no_navigation_entry_| will be used for page title.
   if (entry) {
@@ skipping 1101 matching lines @@
 }
 
 void WebContentsImpl::OnFrameRemoved(
     RenderViewHostImpl* render_view_host,
     int64 frame_id) {
    FOR_EACH_OBSERVER(WebContentsObserver, observers_,
                      FrameDetached(render_view_host, frame_id));
 }
 
 }  // namespace content