Cast audio only policy enforcement support.

extensions/browser/api/cast_channel/cast_channel_apitest.cc

Index: extensions/browser/api/cast_channel/cast_channel_apitest.cc
diff --git a/extensions/browser/api/cast_channel/cast_channel_apitest.cc b/extensions/browser/api/cast_channel/cast_channel_apitest.cc
index 2b5fa6b1492c5f99118517cd3c7e765c596d8cff..45314c837f870f9fd823cfea1de3ad0065baae97 100644
--- a/extensions/browser/api/cast_channel/cast_channel_apitest.cc
+++ b/extensions/browser/api/cast_channel/cast_channel_apitest.cc
@@ -103,6 +103,7 @@ class MockCastSocket : public CastSocket {
   MOCK_CONST_METHOD0(ip_endpoint, const net::IPEndPoint&());
   MOCK_CONST_METHOD0(id, int());
   MOCK_METHOD1(set_id, void(int id));
+  MOCK_METHOD1(set_has_video_out, void(bool has_video_out));
   MOCK_CONST_METHOD0(channel_auth, ChannelAuthType());
   MOCK_CONST_METHOD0(cast_url, std::string());
   MOCK_CONST_METHOD0(ready_state, ReadyState());
@@ -144,6 +145,8 @@ class CastChannelAPITest : public ExtensionApiTest {
         .WillByDefault(SaveArg<0>(&channel_id_));
     ON_CALL(*mock_cast_socket_, id())
         .WillByDefault(ReturnPointee(&channel_id_));
+    ON_CALL(*mock_cast_socket_, set_has_video_out(_))
+        .WillByDefault(SaveArg<0>(&has_video_out_));
     ON_CALL(*mock_cast_socket_, ip_endpoint())
         .WillByDefault(ReturnRef(ip_endpoint_));
     ON_CALL(*mock_cast_socket_, channel_auth())
@@ -234,6 +237,7 @@ class CastChannelAPITest : public ExtensionApiTest {
   CastTransport::Delegate* message_delegate_;
   net::CapturingNetLog capturing_net_log_;
   int channel_id_;
+  bool has_video_out_;
 };
 
 // TODO(munjal): Win Dbg has a workaround that makes RunExtensionSubtest