Remove obsolete path of getSources.

content/content_tests.gypi

 # Copyright (c) 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': {
     'layouttest_support_content_sources': [
       'public/test/layouttest_support.h',
       'public/test/nested_message_pump_android.cc',
       'public/test/nested_message_pump_android.h',
@@ skipping 544 matching lines @@
         'browser/renderer_host/input/synthetic_gesture_controller_unittest.cc',
         'browser/renderer_host/input/tap_suppression_controller_unittest.cc',
         'browser/renderer_host/input/touch_action_filter_unittest.cc',
         'browser/renderer_host/input/touch_emulator_unittest.cc',
         'browser/renderer_host/input/touch_event_queue_unittest.cc',
         'browser/renderer_host/input/touch_handle_unittest.cc',
         'browser/renderer_host/input/touch_selection_controller_unittest.cc',
         'browser/renderer_host/input/web_input_event_util_unittest.cc',
         'browser/renderer_host/media/audio_input_device_manager_unittest.cc',
         'browser/renderer_host/media/audio_renderer_host_unittest.cc',
-        'browser/renderer_host/media/device_request_message_filter_unittest.cc',
         'browser/renderer_host/media/media_stream_dispatcher_host_unittest.cc',
         'browser/renderer_host/media/media_stream_manager_unittest.cc',
         'browser/renderer_host/media/media_stream_ui_proxy_unittest.cc',
         'browser/renderer_host/media/video_capture_buffer_pool_unittest.cc',
         'browser/renderer_host/media/video_capture_controller_unittest.cc',
         'browser/renderer_host/media/video_capture_host_unittest.cc',
         'browser/renderer_host/media/video_capture_manager_unittest.cc',
         'browser/renderer_host/pepper/browser_ppapi_host_test.cc',
         'browser/renderer_host/pepper/browser_ppapi_host_test.h',
         'browser/renderer_host/pepper/pepper_file_system_browser_host_unittest.cc',
@@ skipping 1351 matching lines @@
                   'files': ['<(PRODUCT_DIR)/libnpapi_test_plugin.so'],
                 },
               ],
             }],
           ],
         },
       ],
     }],
   ],
 }