Feed audio constraints over to WebRtcLocalAudioTrack

content/renderer/media/rtc_media_constraints.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 #include "content/renderer/media/rtc_media_constraints.h"
 
 #include "base/logging.h"
 #include "base/strings/string_util.h"
 #include "content/common/media/media_stream_options.h"
 #include "third_party/WebKit/public/platform/WebMediaConstraints.h"
 #include "third_party/WebKit/public/platform/WebCString.h"
@@ skipping 24 matching lines @@
       continue;
 
     DVLOG(3) << "MediaStreamConstraints:" << new_constraint.key
              << " : " <<  new_constraint.value;
     native_constraints->push_back(new_constraint);
   }
 }
 
 }  // namespace
 
+RTCMediaConstraints::RTCMediaConstraints() {}
+
 RTCMediaConstraints::RTCMediaConstraints(
       const WebKit::WebMediaConstraints& constraints) {
   if (constraints.isNull())
     return;  // Will happen in unit tests.
   WebKit::WebVector<WebKit::WebMediaConstraint> mandatory;
   constraints.getMandatoryConstraints(mandatory);
   GetNativeMediaConstraints(mandatory, &mandatory_);
   WebKit::WebVector<WebKit::WebMediaConstraint> optional;
   constraints.getOptionalConstraints(optional);
   GetNativeMediaConstraints(optional, &optional_);
 }
 
 RTCMediaConstraints::~RTCMediaConstraints() {}
 
 const webrtc::MediaConstraintsInterface::Constraints&
 RTCMediaConstraints::GetMandatory() const  {
   return mandatory_;
 }
 
 const webrtc::MediaConstraintsInterface::Constraints&
 RTCMediaConstraints::GetOptional() const {
   return optional_;
 }
 
 void RTCMediaConstraints::AddOptional(const std::string& key,
                                       const std::string& value) {
   optional_.push_back(Constraint(key, value));
 }
 
+bool RTCMediaConstraints::AddMandatory(const std::string& key,
+                                       const std::string& value,
+                                       bool override_if_exists) {
+  for (Constraints::iterator iter = mandatory_.begin();
+       iter != mandatory_.end();
+       ++iter) {
+    if (iter->key == key) {
+      if (override_if_exists)
+        iter->value = value;
+      return override_if_exists;
+    }
+  }
+  // The key wasn't found, add it.
+  mandatory_.push_back(Constraint(key, value));
+  return true;
+}
+
 }  // namespace content