Add authentication support to AttachmentUploaderImpl.

sync/sync_tests.gypi

 # 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.
 
 {
   'targets': [
     # Test support files for the 'sync_core' target.
     {
       'target_name': 'test_support_sync_core',
       'type': 'static_library',
@@ skipping 386 matching lines @@
     # library because the unit test files have to be compiled directly
     # into the executable, so we push the target files to the
     # depending executable target via direct_dependent_settings.
     {
       'target_name': 'sync_internal_api_tests',
       'type': 'none',
       # We only want unit test executables to include this target.
       'suppress_wildcard': 1,
       'dependencies': [
         '../base/base.gyp:base',
+        '../google_apis/google_apis.gyp:google_apis_test_support',
         '../net/net.gyp:net',
         '../net/net.gyp:net_test_support',
         '../testing/gmock.gyp:gmock',
         '../testing/gtest.gyp:gtest',
         'sync',
         'test_support_sync_internal_api',
       ],
       # Propagate all dependencies since the actual compilation
       # happens in the dependents.
       'export_dependent_settings': [
@@ skipping 211 matching lines @@
           ],
           'variables': {
             'test_suite_name': 'sync_unit_tests',
           },
           'includes': [ '../build/apk_test.gypi' ],
         },
       ],
     }],
   ],
 }