Update some uses of char16 to use the base:: namespace.

content/shell/renderer/test_runner/WebTestProxy.cpp

 // Copyright 2013 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/shell/renderer/test_runner/WebTestProxy.h"
 
 #include <cctype>
 
 #include "content/shell/renderer/test_runner/AccessibilityController.h"
 #include "content/shell/renderer/test_runner/EventSender.h"
@@ skipping 273 matching lines @@
     }
 
     if (!recursive)
         return result;
     for (WebFrame* child = frame->firstChild(); child; child = child->nextSibling())
         result += dumpFrameScrollPosition(child, recursive);
     return result;
 }
 
 struct ToLower {
-    char16 operator()(char16 c) { return tolower(c); }
+    base::char16 operator()(base::char16 c) { return tolower(c); }
 };
 
 // Returns True if item1 < item2.
 bool HistoryItemCompareLess(const WebHistoryItem& item1, const WebHistoryItem& item2)
 {
     base::string16 target1 = item1.target();
     base::string16 target2 = item2.target();
     std::transform(target1.begin(), target1.end(), target1.begin(), ToLower());
     std::transform(target2.begin(), target2.end(), target2.begin(), ToLower());
     return target1 < target2;
@@ skipping 1053 matching lines @@
 
 void WebTestProxyBase::resetInputMethod()
 {
     // If a composition text exists, then we need to let the browser process
     // to cancel the input method's ongoing composition session.
     if (m_webWidget)
         m_webWidget->confirmComposition();
 }
 
 }