Use a direct include of strings headers in chrome/test/.

chrome/test/webdriver/commands/chrome_commands.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/test/webdriver/commands/chrome_commands.h"
 
 #include <string>
 #include <vector>
 
 #include "base/files/file_path.h"
-#include "base/stringprintf.h"
+#include "base/strings/stringprintf.h"
 #include "chrome/test/automation/value_conversion_util.h"
 #include "chrome/test/webdriver/commands/response.h"
 #include "chrome/test/webdriver/webdriver_error.h"
 #include "chrome/test/webdriver/webdriver_session.h"
 #include "chrome/test/webdriver/webdriver_util.h"
 
 using base::DictionaryValue;
 using base::ListValue;
 using base::Value;
 
@@ skipping 254 matching lines @@
 
   Error* error = session_->HeapProfilerDump(reason);
   if (error) {
     response->SetError(error);
     return;
   }
 }
 #endif  // !defined(NO_TCMALLOC) && (defined(OS_LINUX) || defined(OS_CHROMEOS))
 
 }  // namespace webdriver