Add base:: to string16s in chrome/.

chrome/test/chromedriver/capabilities.cc

 // Copyright (c) 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 "chrome/test/chromedriver/capabilities.h"
 
 #include <map>
 
 #include "base/bind.h"
 #include "base/callback.h"
@@ skipping 297 matching lines @@
 }
 
 void Switches::SetSwitch(const std::string& name, const std::string& value) {
 #if defined(OS_WIN)
   SetSwitch(name, UTF8ToUTF16(value));
 #else
   switch_map_[name] = value;
 #endif
 }
 
-void Switches::SetSwitch(const std::string& name, const string16& value) {
+void Switches::SetSwitch(const std::string& name, const base::string16& value) {
 #if defined(OS_WIN)
   switch_map_[name] = value;
 #else
   SetSwitch(name, UTF16ToUTF8(value));
 #endif
 }
 
 void Switches::SetSwitch(const std::string& name, const base::FilePath& value) {
   SetSwitch(name, value.value());
 }
@@ skipping 103 matching lines @@
     if (desired_caps.Get(it->first, &capability)) {
       Status status = it->second.Run(*capability, this);
       if (status.IsError()) {
         return Status(
             kUnknownError, "cannot parse capability: " + it->first, status);
       }
     }
   }
   return Status(kOk);
 }