Implement MediaCaptureDevices.

content/content_browser.gypi

Index: content/content_browser.gypi
diff --git a/content/content_browser.gypi b/content/content_browser.gypi
index 4e9474a4e3570102e98e987b44f51a1f5e2a310f..ab398f02bf937df0d68167572f9e3b338ac5209d 100644
--- a/content/content_browser.gypi
+++ b/content/content_browser.gypi
@@ -121,9 +121,9 @@
     'public/browser/load_notification_details.h',
     'public/browser/local_storage_usage_info.cc',
     'public/browser/local_storage_usage_info.h',
+    'public/browser/media_capture_devices.h',
     'public/browser/media_device_id.cc',
     'public/browser/media_device_id.h',
-    'public/browser/media_devices_monitor.h',
     'public/browser/native_web_keyboard_event.h',
     'public/browser/navigation_controller.cc',
     'public/browser/navigation_controller.h',
@@ -727,7 +727,6 @@
     'browser/media/android/media_drm_credential_manager.h',
     'browser/media/android/media_resource_getter_impl.cc',
     'browser/media/android/media_resource_getter_impl.h',
-    'browser/media/media_devices_monitor.cc',
     'browser/media/media_internals.cc',
     'browser/media/media_internals.h',
     'browser/media/media_internals_handler.cc',
@@ -934,6 +933,8 @@
     'browser/renderer_host/media/audio_sync_reader.h',
     'browser/renderer_host/media/device_request_message_filter.cc',
     'browser/renderer_host/media/device_request_message_filter.h',
+    'browser/renderer_host/media/media_capture_devices_impl.cc',
+    'browser/renderer_host/media/media_capture_devices_impl.h',
     'browser/renderer_host/media/media_stream_dispatcher_host.cc',
     'browser/renderer_host/media/media_stream_dispatcher_host.h',
     'browser/renderer_host/media/media_stream_manager.cc',