Move StartsWith[ASCII] to base namespace.

chrome/browser/media/webrtc_browsertest_base.cc

 // 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 "chrome/browser/media/webrtc_browsertest_base.h"
 
 #include "base/lazy_instance.h"
 #include "base/strings/string_util.h"
 #include "base/strings/stringprintf.h"
 #include "chrome/browser/infobars/infobar_responder.h"
@@ skipping 304 matching lines @@
   EXPECT_TRUE(is_video_playing);
   return is_video_playing;
 }
 
 std::string WebRtcTestBase::GetStreamSize(
     content::WebContents* tab_contents,
     const std::string& video_element) const {
   std::string javascript =
       base::StringPrintf("getStreamSize('%s')", video_element.c_str());
   std::string result = ExecuteJavascript(javascript, tab_contents);
-  EXPECT_TRUE(StartsWithASCII(result, "ok-", true));
+  EXPECT_TRUE(base::StartsWithASCII(result, "ok-", true));
   return result.substr(3);
 }
 
 bool WebRtcTestBase::HasWebcamAvailableOnSystem(
     content::WebContents* tab_contents) const {
   std::string result =
       ExecuteJavascript("hasVideoInputDeviceOnSystem();", tab_contents);
   return result == "has-video-input-device";
 }
 
 bool WebRtcTestBase::OnWinXp() const {
 #if defined(OS_WIN)
   return base::win::GetVersion() <= base::win::VERSION_XP;
 #else
   return false;
 #endif
 }
 
 bool WebRtcTestBase::OnWin8() const {
 #if defined(OS_WIN)
   return base::win::GetVersion() > base::win::VERSION_WIN7;
 #else
   return false;
 #endif
 }