Use base namespace for string16 in chrome/renderer.

chrome/renderer/spellchecker/spellcheck_provider_test.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 "chrome/renderer/spellchecker/spellcheck_provider_test.h"
 
 #include "base/stl_util.h"
 #include "chrome/common/spellcheck_marker.h"
 #include "chrome/common/spellcheck_messages.h"
 #include "chrome/renderer/spellchecker/spellcheck.h"
@@ skipping 43 matching lines @@
     delete message;
     return true;
   }
 
   messages_.push_back(message);
   return true;
 }
 
 void TestingSpellCheckProvider::OnCallSpellingService(int route_id,
                            int identifier,
-                           const string16& text,
+                           const base::string16& text,
                            const std::vector<SpellCheckMarker>& markers) {
 #if defined (OS_MACOSX)
   NOTREACHED();
 #else
   ++spelling_service_call_count_;
   blink::WebTextCheckingCompletion* completion =
       text_check_completions_.Lookup(identifier);
   if (!completion) {
     ResetResult();
     return;
@@ skipping 11 matching lines @@
 }
 
 void TestingSpellCheckProvider::ResetResult() {
   text_.clear();
 }
 
 SpellCheckProviderTest::SpellCheckProviderTest() {}
 SpellCheckProviderTest::~SpellCheckProviderTest() {}