Add IPC to query capabilities of video input devices.

content/renderer/media/user_media_client_impl_unittest.cc

Index: content/renderer/media/user_media_client_impl_unittest.cc
diff --git a/content/renderer/media/user_media_client_impl_unittest.cc b/content/renderer/media/user_media_client_impl_unittest.cc
index 41f634f55f12dfe6a793f9d8ce59a85e0fae6600..e2fdcf8ccea37ddb5bb27c62af3fe81e02ba9556 100644
--- a/content/renderer/media/user_media_client_impl_unittest.cc
+++ b/content/renderer/media/user_media_client_impl_unittest.cc
@@ -126,6 +126,9 @@ class MockMediaDevicesDispatcherHost
                     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));
 };
 
 class UserMediaClientImplUnderTest : public UserMediaClientImpl {