Update some uses of UTF conversions in chrome/browser to use the base:: namespace.

chrome/browser/tab_contents/view_source_browsertest.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 "base/strings/utf_string_conversions.h"
 #include "chrome/app/chrome_command_ids.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_commands.h"
 #include "chrome/browser/ui/tabs/tab_strip_model.h"
 #include "chrome/common/url_constants.h"
@@ skipping 22 matching lines @@
 IN_PROC_BROWSER_TEST_F(ViewSourceTest, DoesBrowserRenderInViewSource) {
   ASSERT_TRUE(embedded_test_server()->InitializeAndWaitUntilReady());
 
   // First we navigate to our view-source test page.
   GURL url(content::kViewSourceScheme + std::string(":") +
            embedded_test_server()->GetURL(kTestHtml).spec());
   ui_test_utils::NavigateToURL(browser(), url);
 
   // Check that the title didn't get set.  It should not be there (because we
   // are in view-source mode).
-  EXPECT_NE(ASCIIToUTF16("foo"),
+  EXPECT_NE(base::ASCIIToUTF16("foo"),
             browser()->tab_strip_model()->GetActiveWebContents()->GetTitle());
 }
 
 // This test renders a page normally and then renders the same page in
 // view-source mode. This is done since we had a problem at one point during
 // implementation of the view-source: prefix being consumed (removed from the
 // URL) if the URL was not changed (apart from adding the view-source prefix)
 IN_PROC_BROWSER_TEST_F(ViewSourceTest, DoesBrowserConsumeViewSourcePrefix) {
   ASSERT_TRUE(embedded_test_server()->InitializeAndWaitUntilReady());
 
@@ skipping 70 matching lines @@
       content::ExecuteScript(browser()->tab_strip_model()->GetWebContentsAt(0),
                              "window.location.reload();"));
 
   content::WindowedNotificationObserver observer2(
       content::NOTIFICATION_LOAD_STOP,
       content::NotificationService::AllSources());
   observer2.Wait();
   ASSERT_TRUE(browser()->tab_strip_model()->GetWebContentsAt(0)->
                   GetController().GetActiveEntry()->IsViewSourceMode());
 }