Remove fileapi::FileSystemFileUtil dependency in media gallery code

chrome/browser/media_galleries/mac/mtp_device_delegate_impl_mac_unittest.mm

 // 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.
 
 #import <Foundation/Foundation.h>
 #import <ImageCaptureCore/ImageCaptureCore.h>
 
 #include "base/file_util.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/mac/cocoa_protocols.h"
 #include "base/mac/foundation_util.h"
 #include "base/mac/scoped_nsobject.h"
 #include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
 #include "base/strings/sys_string_conversions.h"
 #include "base/synchronization/waitable_event.h"
 #include "base/test/sequenced_worker_pool_owner.h"
 #include "base/threading/sequenced_worker_pool.h"
 #include "chrome/browser/media_galleries/mac/mtp_device_delegate_impl_mac.h"
 #include "chrome/browser/storage_monitor/image_capture_device_manager.h"
 #include "chrome/browser/storage_monitor/test_storage_monitor.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/test/test_browser_thread.h"
 #include "testing/gtest/include/gtest/gtest.h"
-#include "webkit/browser/fileapi/file_system_file_util.h"
 
 #if !defined(MAC_OS_X_VERSION_10_7) || \
     MAC_OS_X_VERSION_MAX_ALLOWED < MAC_OS_X_VERSION_10_7
 
 @interface NSObject (ICCameraDeviceDelegateLionAPI)
 - (void)deviceDidBecomeReadyWithCompleteContentCatalog:(ICDevice*)device;
 - (void)didDownloadFile:(ICCameraFile*)file
                   error:(NSError*)error
                 options:(NSDictionary*)options
             contextInfo:(void*)contextInfo;
@@ skipping 118 matching lines @@
 - (NSDate*)creationDate {
   return date_.get();
 }
 
 - (off_t)fileSize {
   return 1000;
 }
 
 @end
 
-// Advances the enumerator. When the method returns, signals the waiting
-// event.
-void EnumerateAndSignal(
-    fileapi::FileSystemFileUtil::AbstractFileEnumerator* enumerator,
-    base::WaitableEvent* event,
-    base::FilePath* path) {
-  *path = enumerator->Next();
-  event->Signal();
-}
-
 class MTPDeviceDelegateImplMacTest : public testing::Test {
  public:
   MTPDeviceDelegateImplMacTest() : camera_(NULL), delegate_(NULL) {}
 
   virtual void SetUp() OVERRIDE {
     ui_thread_.reset(new content::TestBrowserThread(
         content::BrowserThread::UI, &message_loop_));
     file_thread_.reset(new content::TestBrowserThread(
         content::BrowserThread::FILE, &message_loop_));
     io_thread_.reset(new content::TestBrowserThread(
@@ skipping 380 matching lines @@
                          temp_dir_.path().Append("target")));
 
   EXPECT_EQ(base::PLATFORM_FILE_OK,
              DownloadFile(base::FilePath("/ic:id/filename"),
                           temp_dir_.path().Append("target")));
   std::string contents;
   EXPECT_TRUE(base::ReadFileToString(temp_dir_.path().Append("target"),
                                      &contents));
   EXPECT_EQ(kTestFileContents, contents);
 }