Move ImageLoaderTest to extensions_unittests

extensions/extensions.gyp

 # Copyright 2013 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.
 
 {
   'variables': {
     'chromium_code': 1,
   },
   'targets': [
     {
@@ skipping 812 matching lines @@
         'browser/admin_policy_unittest.cc',
         'browser/api/api_resource_manager_unittest.cc',
         'browser/computed_hashes_unittest.cc',
         'browser/content_hash_tree_unittest.cc',
         'browser/event_listener_map_unittest.cc',
         'browser/event_router_unittest.cc',
         'browser/extension_pref_value_map_unittest.cc',
         'browser/extension_registry_unittest.cc',
         'browser/file_highlighter_unittest.cc',
         'browser/file_reader_unittest.cc',
+        'browser/image_loader_unittest.cc',
         'browser/image_util_unittest.cc',
         'browser/lazy_background_task_queue_unittest.cc',
         'browser/management_policy_unittest.cc',
         'browser/process_manager_unittest.cc',
         'browser/process_map_unittest.cc',
         'browser/quota_service_unittest.cc',
         'browser/runtime_data_unittest.cc',
         'browser/value_store/leveldb_value_store_unittest.cc',
         'browser/value_store/testing_value_store_unittest.cc',
         'browser/value_store/value_store_change_unittest.cc',
@@ skipping 45 matching lines @@
       'type': 'static_library',
       'sources': [ 'browser/api/cast_channel/cast_channel.proto' ],
       'variables': {
           'proto_in_dir': 'browser/api/cast_channel',
           'proto_out_dir': 'extensions/browser/api/cast_channel',
       },
       'includes': [ '../build/protoc.gypi' ]
     },
   ]
 }