Remove DrivePrefetcher and relevant flags.

chrome/chrome_browser_chromeos.gypi

 # 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.
 
 {
   'targets': [
     {
       'target_name': 'browser_chromeos',
       'type': 'static_library',
@@ skipping 207 matching lines @@
         'browser/chromeos/drive/download_handler.h',
         'browser/chromeos/drive/drive_cache.cc',
         'browser/chromeos/drive/drive_cache.h',
         'browser/chromeos/drive/drive_file_stream_reader.cc',
         'browser/chromeos/drive/drive_file_stream_reader.h',
         'browser/chromeos/drive/drive_file_system.cc',
         'browser/chromeos/drive/drive_file_system.h',
         'browser/chromeos/drive/drive_file_system_interface.h',
         'browser/chromeos/drive/drive_file_system_metadata.cc',
         'browser/chromeos/drive/drive_file_system_metadata.h',
-        'browser/chromeos/drive/drive_prefetcher.cc',
-        'browser/chromeos/drive/drive_prefetcher.h',
         'browser/chromeos/drive/drive_protocol_handler.cc',
         'browser/chromeos/drive/drive_protocol_handler.h',
         'browser/chromeos/drive/drive_resource_metadata.cc',
         'browser/chromeos/drive/drive_resource_metadata.h',
         'browser/chromeos/drive/drive_system_service.cc',
         'browser/chromeos/drive/drive_system_service.h',
         'browser/chromeos/drive/drive_url_request_job.cc',
         'browser/chromeos/drive/drive_url_request_job.h',
         'browser/chromeos/drive/drive_webapps_registry.cc',
         'browser/chromeos/drive/drive_webapps_registry.h',
@@ skipping 647 matching lines @@
         'browser/chromeos/policy/proto/install_attributes.proto',
       ],
       'variables': {
         'proto_in_dir': 'browser/chromeos/policy/proto',
         'proto_out_dir': 'chrome/browser/chromeos/policy/proto',
       },
       'includes': [ '../build/protoc.gypi' ]
     },
   ],
 }