Move ReadFileToString to the base namespace.

chrome/browser/ui/browser_focus_uitest.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/bind.h"
 #include "base/file_util.h"
 #include "base/format_macros.h"
 #include "base/message_loop/message_loop.h"
 #include "base/path_service.h"
 #include "base/strings/string_number_conversions.h"
@@ skipping 154 matching lines @@
 };
 
 class TestInterstitialPage : public content::InterstitialPageDelegate {
  public:
   TestInterstitialPage(WebContents* tab, bool new_navigation, const GURL& url) {
     base::FilePath file_path;
     bool r = PathService::Get(chrome::DIR_TEST_DATA, &file_path);
     EXPECT_TRUE(r);
     file_path = file_path.AppendASCII("focus");
     file_path = file_path.AppendASCII(kTypicalPageName);
-    r = file_util::ReadFileToString(file_path, &html_contents_);
+    r = base::ReadFileToString(file_path, &html_contents_);
     EXPECT_TRUE(r);
     interstitial_page_ = InterstitialPage::Create(
         tab, new_navigation, url , this);
     interstitial_page_->Show();
   }
 
   virtual std::string GetHTMLContents() OVERRIDE {
     return html_contents_;
   }
 
@@ skipping 754 matching lines @@
         content::NOTIFICATION_NAV_ENTRY_COMMITTED,
         content::NotificationService::AllSources());
     chrome::GoForward(browser(), CURRENT_TAB);
     forward_nav_observer.Wait();
   }
 
   EXPECT_FALSE(IsViewFocused(VIEW_ID_OMNIBOX));
 }
 
 }  // namespace