Wire up chrome field trials with webrtc.

content/renderer/media/media_stream_dependency_factory.cc

Index: content/renderer/media/media_stream_dependency_factory.cc
diff --git a/content/renderer/media/media_stream_dependency_factory.cc b/content/renderer/media/media_stream_dependency_factory.cc
index 0b13677591bdc9f112b074d380a6557030c8c5a8..1fbbcd71266cf103867d920f86cde0c013937bdc 100644
--- a/content/renderer/media/media_stream_dependency_factory.cc
+++ b/content/renderer/media/media_stream_dependency_factory.cc
@@ -7,6 +7,7 @@
 #include <vector>
 
 #include "base/command_line.h"
+#include "base/metrics/field_trial.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/synchronization/waitable_event.h"
 #include "content/common/media/media_stream_messages.h"
@@ -41,6 +42,7 @@
 #include "third_party/WebKit/public/web/WebDocument.h"
 #include "third_party/WebKit/public/web/WebFrame.h"
 #include "third_party/libjingle/source/talk/app/webrtc/mediaconstraintsinterface.h"
+#include "third_party/webrtc/system_wrappers/interface/field_trial.h"
 
 #if defined(USE_OPENSSL)
 #include "third_party/libjingle/source/talk/base/ssladapter.h"
@@ -269,6 +271,9 @@ void MediaStreamDependencyFactory::CreatePeerConnectionFactory() {
 
   DVLOG(1) << "MediaStreamDependencyFactory::CreatePeerConnectionFactory()";
 
+  // Initialize webrtc field trial before start calling into webrtc code.
+  webrtc::FieldTrial::Init(&base::FieldTrialList::FindFullName);

[tommi (sloooow) - chröme, 2014/05/07 12:49:33]

Would InitializeWebRtcModule be a better place to call this function?
It gets called much earlier and at a more reliable point in time.

https://code.google.com/p/chromium/codesearch#chromium/src/third_party/libjin...

+
   jingle_glue::JingleThreadWrapper::EnsureForCurrentMessageLoop();
   jingle_glue::JingleThreadWrapper::current()->set_send_allowed(true);
   signaling_thread_ = jingle_glue::JingleThreadWrapper::current();