Move ReadFileToString to the base namespace.

chrome_frame/test/navigation_test.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 <string>
 
 #include "base/file_util.h"
 #include "base/test/test_file_util.h"
 #include "base/win/scoped_comptr.h"
 #include "base/win/windows_version.h"
@@ skipping 853 matching lines @@
 
   EXPECT_CALL(save_dialog_watcher, OnWindowClose(_))
         .WillOnce(testing::DoAll(
             WaitForFileSave(temp_file_path, 3000),
             testing::InvokeWithoutArgs(
                 testing::CreateFunctor(CloseWindow, &owner_window)),
             CloseBrowserMock(&ie_mock_)));
   LaunchIENavigateAndLoop(src_url, kChromeFrameVeryLongNavigationTimeout);
 
   std::string data;
-  EXPECT_TRUE(file_util::ReadFileToString(temp_file_path, &data));
+  EXPECT_TRUE(base::ReadFileToString(temp_file_path, &data));
   EXPECT_EQ("hello", data);
   file_util::DieFileDie(temp_file_path, false);
 }
 
 // Test fixture for testing if http header works for supported content types
 class HttpHeaderTest : public MockIEEventSinkTest, public testing::Test {
  public:
   HttpHeaderTest() {}
 
   void HeaderTestWithData(const char* content_type, const char* data) {
@@ skipping 405 matching lines @@
       .WillOnce(CloseBrowserMock(
           &no_referrer_target_opener_window_mock));
 
   EXPECT_CALL(no_referrer_target_opener_window_mock, OnQuit())
       .WillOnce(CloseBrowserMock(&ie_mock_));
 
   LaunchIENavigateAndLoop(initial_url, kChromeFrameVeryLongNavigationTimeout);
 }
 
 }  // namespace chrome_frame_test