Implement "Key Presence" step in "Encrypted Block Encounted" algorithm in EME.

content/content_tests.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': 'test_support_content',
       'type': 'static_library',
       'defines!': ['CONTENT_IMPLEMENTATION'],
@@ skipping 390 matching lines @@
         '../webkit/fileapi/mock_file_system_options.cc',
         '../webkit/fileapi/mock_file_system_options.h',
         '../webkit/fileapi/obfuscated_file_util_unittest.cc',
         '../webkit/fileapi/sandbox_mount_point_provider_unittest.cc',
         '../webkit/fileapi/test_file_set.cc',
         '../webkit/fileapi/test_file_set.h',
         '../webkit/fileapi/webfilewriter_base_unittest.cc',
         '../webkit/media/buffered_data_source_unittest.cc',
         '../webkit/media/buffered_resource_loader_unittest.cc',
         '../webkit/media/cache_util_unittest.cc',
+        '../webkit/media/crypto/proxy_decryptor_unittest.cc',
         '../webkit/media/skcanvas_video_renderer_unittest.cc',
         '../webkit/media/test_response_generator.cc',
         '../webkit/media/test_response_generator.h',
         '../webkit/mocks/mock_weburlloader.cc',
         '../webkit/mocks/mock_weburlloader.h',
         '../webkit/quota/mock_quota_manager.cc',
         '../webkit/quota/mock_quota_manager.h',
         '../webkit/quota/mock_quota_manager_unittest.cc',
         '../webkit/quota/mock_storage_client.cc',
         '../webkit/quota/mock_storage_client.h',
@@ skipping 288 matching lines @@
               '<(PRODUCT_DIR)/lib.java/chromium_content.jar',
               '<(PRODUCT_DIR)/lib.java/chromium_net.jar',
             ],
           },
           'includes': [ '../build/apk_test.gypi' ],
         },
       ],
     }],
   ],
 }