Move ReadFileToString to the base namespace.

chrome/browser/net/proxy_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/command_line.h"
 #include "base/path_service.h"
 #include "base/strings/string_util.h"
 #include "base/strings/stringprintf.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/chrome_notification_types.h"
@@ skipping 217 matching lines @@
 
 // Fetch PAC script via a data: URL.
 class DataProxyScriptBrowserTest : public InProcessBrowserTest {
  public:
   DataProxyScriptBrowserTest() {}
   virtual ~DataProxyScriptBrowserTest() {}
 
   virtual void SetUpCommandLine(CommandLine* command_line) OVERRIDE {
     std::string contents;
     // Read in kPACScript contents.
-    ASSERT_TRUE(file_util::ReadFileToString(ui_test_utils::GetTestFilePath(
+    ASSERT_TRUE(base::ReadFileToString(ui_test_utils::GetTestFilePath(
         base::FilePath(base::FilePath::kCurrentDirectory),
         base::FilePath(kPACScript)),
         &contents));
     command_line->AppendSwitchASCII(switches::kProxyPacUrl,
         std::string("data:,") + contents);
   }
 
  private:
   DISALLOW_COPY_AND_ASSIGN(DataProxyScriptBrowserTest);
 };
 
 IN_PROC_BROWSER_TEST_F(DataProxyScriptBrowserTest, Verify) {
   VerifyProxyScript(browser());
 }
 
 }  // namespace