Reduce APK size by disabling WebRTC.

remoting/client/chromoting_client.cc

Index: remoting/client/chromoting_client.cc
diff --git a/remoting/client/chromoting_client.cc b/remoting/client/chromoting_client.cc
index 1f7165ab5db91f8a8a5b2f59b467e9bf7f02e8c3..ab93887331839ff92eb75fffbc5477f202f5e54f 100644
--- a/remoting/client/chromoting_client.cc
+++ b/remoting/client/chromoting_client.cc
@@ -74,9 +74,9 @@ void ChromotingClient::Start(
       DCHECK(!protocol_config_->ice_supported());
 #if defined(OS_NACL)
       LOG(FATAL) << "WebRTC is not supported in webapp.";

[Sergey Ulanov, 2016/03/16 19:12:36]

We want this LOG(FATAL) on all platforms:
#if !defined(ENABLED_WEBRTC_CLIENT) 
  LOG(FATAL) << "WebRTC is not supported";
#elif
   ....
#endif

[Yuwei, 2016/03/16 21:21:00]

Done.

-#else   // defined(OS_NACL)
+#elif !defined(DISABLE_WEBRTC)   // defined(OS_NACL)
       connection_.reset(new protocol::WebrtcConnectionToHost());
-#endif  // !defined(OS_NACL)
+#endif  // !defined(OS_NACL) && !defined(DISABLE_WEBRTC)
     } else {
       DCHECK(protocol_config_->ice_supported());
       connection_.reset(new protocol::IceConnectionToHost());