Add more string_util functions to base namespace.

chrome/browser/extensions/api/webrtc_audio_private/webrtc_audio_private_browsertest.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 "base/json/json_writer.h"
 #include "base/strings/string_util.h"
 #include "base/strings/stringprintf.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/synchronization/waitable_event.h"
 #include "base/threading/platform_thread.h"
@@ skipping 378 matching lines @@
                        RunComponentExtensionTest) {
   // This runs the end-to-end JavaScript test for the Hangout Services
   // component extension, which uses the webrtcAudioPrivate API among
   // others.
   ASSERT_TRUE(StartEmbeddedTestServer());
   GURL url(embedded_test_server()->GetURL(
                "/extensions/hangout_services_test.html"));
   // The "externally connectable" extension permission doesn't seem to
   // like when we use 127.0.0.1 as the host, but using localhost works.
   std::string url_spec = url.spec();
-  ReplaceFirstSubstringAfterOffset(&url_spec, 0, "127.0.0.1", "localhost");
+  base::ReplaceFirstSubstringAfterOffset(
+      &url_spec, 0, "127.0.0.1", "localhost");
   GURL localhost_url(url_spec);
   ui_test_utils::NavigateToURL(browser(), localhost_url);
 
   WebContents* tab = browser()->tab_strip_model()->GetActiveWebContents();
   WaitUntilAudioIsPlaying(tab);
 
   // Override, i.e. disable, uploading. We don't want to try sending data to
   // servers when running the test. We don't bother about the contents of the
   // buffer |dummy|, that's tested in other tests.
   std::string dummy;
   g_browser_process->webrtc_log_uploader()->
       OverrideUploadWithBufferForTesting(&dummy);
 
   ASSERT_TRUE(content::ExecuteScript(tab, "browsertestRunAllTests();"));
 
   content::TitleWatcher title_watcher(tab, base::ASCIIToUTF16("success"));
   title_watcher.AlsoWaitForTitle(base::ASCIIToUTF16("failure"));
   base::string16 result = title_watcher.WaitAndGetTitle();
   EXPECT_EQ(base::ASCIIToUTF16("success"), result);
 
   g_browser_process->webrtc_log_uploader()->OverrideUploadWithBufferForTesting(
       NULL);
 }
 #endif  // defined(GOOGLE_CHROME_BUILD) || defined(ENABLE_HANGOUT_SERVICES_EXTENSION)
 
 }  // namespace extensions