Move most of extension_file_util.cc into extensions/common/file_util.cc

chrome/browser/extensions/unpacked_installer.h

 // 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.
 
 #ifndef CHROME_BROWSER_EXTENSIONS_UNPACKED_INSTALLER_H_
 #define CHROME_BROWSER_EXTENSIONS_UNPACKED_INSTALLER_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 67 matching lines @@
 
   // Verifies if loading unpacked extensions is allowed.
   bool IsLoadingUnpackedAllowed() const;
 
   // We change the input extension path to an absolute path, on the file thread.
   // Then we need to check the file access preference, which needs
   // to happen back on the UI thread, so it posts CheckExtensionFileAccess on
   // the UI thread. In turn, once that gets the pref, it goes back to the
   // file thread with LoadWithFileAccess.
   // TODO(yoz): It would be nice to remove this ping-pong, but we need to know
-  // what file access flags to pass to extension_file_util::LoadExtension.
+  // what file access flags to pass to file_util::LoadExtension.
   void GetAbsolutePath();
   void CheckExtensionFileAccess();
   void LoadWithFileAccess(int flags);
 
   // Notify the frontend that an attempt to retry will not be necessary.
   void UnregisterLoadRetryListener();
 
   // Notify the frontend that there was an error loading an extension.
   void ReportExtensionLoadError(const std::string& error);
 
@@ skipping 20 matching lines @@
 
   // Gives access to common methods and data of an extension installer.
   ExtensionInstaller installer_;
 
   DISALLOW_COPY_AND_ASSIGN(UnpackedInstaller);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_BROWSER_EXTENSIONS_UNPACKED_INSTALLER_H_