Add IPC to query capabilities of video input devices.

content/renderer/media/media_devices_event_dispatcher_unittest.cc

 // Copyright 2016 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.
 
 #include "content/renderer/media/media_devices_event_dispatcher.h"
 
 #include <stddef.h>
 
 #include <memory>
 #include <string>
@@ skipping 29 matching lines @@
                     bool request_video_input,
                     bool request_audio_output,
                     const url::Origin& security_origin,
                     const EnumerateDevicesCallback& callback));
   MOCK_METHOD3(SubscribeDeviceChangeNotifications,
                void(MediaDeviceType type,
                     uint32_t subscription_id,
                     const url::Origin& security_origin));
   MOCK_METHOD2(UnsubscribeDeviceChangeNotifications,
                void(MediaDeviceType type, uint32_t subscription_id));
+  MOCK_METHOD2(GetVideoInputCapabilities,
+               void(const url::Origin& security_origin,
+                    const GetVideoInputCapabilitiesCallback& client_callback));
 
   ::mojom::MediaDevicesDispatcherHostPtr CreateInterfacePtrAndBind() {
     return binding_.CreateInterfacePtrAndBind();
   }
 
  private:
   mojo::Binding<::mojom::MediaDevicesDispatcherHost> binding_;
 };
 
 class MediaDevicesEventDispatcherTest : public ::testing::Test {
@@ skipping 124 matching lines @@
     MediaDeviceType type = static_cast<MediaDeviceType>(i);
     EXPECT_CALL(
         media_devices_dispatcher_,
         UnsubscribeDeviceChangeNotifications(type, subscription_list_2[type]));
   }
   event_dispatcher_->UnsubscribeDeviceChangeNotifications(subscription_list_2);
   base::RunLoop().RunUntilIdle();
 }
 
 }  // namespace content