iOS HW H264 support.

talk/app/webrtc/objc/RTCPeerConnectionFactory.mm

Index: talk/app/webrtc/objc/RTCPeerConnectionFactory.mm
diff --git a/talk/app/webrtc/objc/RTCPeerConnectionFactory.mm b/talk/app/webrtc/objc/RTCPeerConnectionFactory.mm
index 50ea47dc6482843fa5d613b4f41bbeaf35da158f..adb9db6c5cc2bb2bd893e23cd6752f70b9f8dfb3 100644
--- a/talk/app/webrtc/objc/RTCPeerConnectionFactory.mm
+++ b/talk/app/webrtc/objc/RTCPeerConnectionFactory.mm
@@ -51,10 +51,11 @@
 #include "talk/app/webrtc/peerconnectioninterface.h"
 #include "talk/app/webrtc/videosourceinterface.h"
 #include "talk/app/webrtc/videotrack.h"
+#include "talk/app/webrtc/objc/h264decoderfactory.h"
+#include "talk/app/webrtc/objc/h264encoderfactory.h"
 #include "webrtc/base/logging.h"
 #include "webrtc/base/ssladapter.h"
 
-
 @implementation RTCPeerConnectionFactory {
   rtc::scoped_ptr<rtc::Thread> _signalingThread;
   rtc::scoped_ptr<rtc::Thread> _workerThread;
@@ -80,8 +81,16 @@
     _workerThread.reset(new rtc::Thread());
     result = _workerThread->Start();
     NSAssert(result, @"Failed to start worker thread.");
+
+    rtc::scoped_ptr<webrtc::H264EncoderFactory> encoderFactory;
+    rtc::scoped_ptr<webrtc::H264DecoderFactory> decoderFactory;
+#if defined(WEBRTC_OBJC_H264)
+    encoderFactory.reset(new webrtc::H264EncoderFactory());
+    decoderFactory.reset(new webrtc::H264DecoderFactory());
+#endif
     _nativeFactory = webrtc::CreatePeerConnectionFactory(
-        _signalingThread.get(), _workerThread.get(), NULL, NULL, NULL);
+        _signalingThread.get(), _workerThread.get(), nullptr,
+        encoderFactory.release(), decoderFactory.release());
     NSAssert(_nativeFactory, @"Failed to initialize PeerConnectionFactory!");
     // Uncomment to get sensitive logs emitted (to stderr or logcat).
     // rtc::LogMessage::LogToDebug(rtc::LS_SENSITIVE);