Pass the sctp command-line flag to Libjingle as an internal-only constraint.

content/renderer/media/rtc_media_constraints.cc

Index: content/renderer/media/rtc_media_constraints.cc
diff --git a/content/renderer/media/rtc_media_constraints.cc b/content/renderer/media/rtc_media_constraints.cc
index 9118152f0bc9230272dacbec4efdb5d26999bc4e..a54825dfdb6c6b0180923641ee51acd175566f56 100644
--- a/content/renderer/media/rtc_media_constraints.cc
+++ b/content/renderer/media/rtc_media_constraints.cc
@@ -26,6 +26,14 @@ void GetNativeMediaConstraints(
     if (new_constraint.key == kMediaStreamSource ||
         new_constraint.key == kMediaStreamSourceId)
       continue;
+
+    // Ignore internal constraints set by JS.
+    // TODO(jiayl): replace the hard coded string with
+    // webrtc::MediaConstraintsInterface::kInternalConstraintPrefix when
+    // the Libjingle change is rolled.
+    if (new_constraint.key.find("internal") == 0)

[tommi (sloooow) - chröme, 2013/05/21 08:03:24]

if "internal" is a prefix, should we use StartsWith[ASCII] instead of find()?
see base/string_util.h.

[jiayl, 2013/05/21 16:57:15]

Done.

+      continue;
+
     DVLOG(3) << "MediaStreamConstraints:" << new_constraint.key
              << " : " <<  new_constraint.value;
     native_constraints->push_back(new_constraint);
@@ -58,4 +66,10 @@ RTCMediaConstraints::GetOptional() const {
   return optional_;
 }
 
+void RTCMediaConstraints::AddOptional(
+    const std::string& key, const std::string& value) {
+  webrtc::MediaConstraintsInterface::Constraint new_constraint(key, value);
+  optional_.push_back(new_constraint);
+}
+
 }  // namespace content