Add ability to retrieve capabilities for audio input devices to MediaDevicesDispatcherHost.

content/renderer/media/user_media_client_impl_unittest.cc

 // 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.
 
 #include "content/renderer/media/user_media_client_impl.h"
 
 #include <stddef.h>
 
 #include <memory>
 #include <utility>
@@ skipping 143 matching lines @@
     device = ::mojom::VideoInputDeviceCapabilities::New();
     device->device_id = kFakeVideoInputDeviceId2;
     device->facing_mode = ::mojom::FacingMode::ENVIRONMENT;
     device->formats.push_back(media::VideoCaptureFormat(
         gfx::Size(640, 480), 30.0f, media::PIXEL_FORMAT_I420));
     result.push_back(std::move(device));
 
     std::move(client_callback).Run(std::move(result));
   }
 
+  void GetAudioInputCapabilities(
+      const url::Origin& security_origin,
+      GetAudioInputCapabilitiesCallback client_callback) override {
+    NOTREACHED();
+  }
+
   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));
 };
 
 class UserMediaClientImplUnderTest : public UserMediaClientImpl {
  public:
@@ skipping 749 matching lines @@
       CreateDeviceConstraints(kFakeAudioInputDeviceId1);
   blink::WebMediaConstraints video_constraints =
       CreateFacingModeConstraints("environment");
   // kFakeVideoInputDeviceId2 has environment facing mode.
   TestValidRequestWithConstraints(audio_constraints, video_constraints,
                                   kFakeAudioInputDeviceId1,
                                   kFakeVideoInputDeviceId2);
 }
 
 }  // namespace content