Measure usage of RTCSessionDescription's type and sdp attributes

third_party/WebKit/Source/modules/peerconnection/RTCSessionDescription.cpp

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 14 matching lines @@
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "modules/peerconnection/RTCSessionDescription.h"
 
 #include "bindings/core/v8/ScriptValue.h"
 #include "bindings/core/v8/V8ObjectBuilder.h"
+#include "core/dom/ExecutionContext.h"
+#include "core/frame/UseCounter.h"
 #include "modules/peerconnection/RTCSessionDescriptionInit.h"
 
 namespace blink {
 
 RTCSessionDescription* RTCSessionDescription::create(
+    ExecutionContext* context,
     const RTCSessionDescriptionInit& descriptionInitDict) {
   String type;
   if (descriptionInitDict.hasType())
     type = descriptionInitDict.type();
+  else
+    UseCounter::count(context, UseCounter::RTCSessionDescriptionInitNoType);
 
   String sdp;
   if (descriptionInitDict.hasSdp())
     sdp = descriptionInitDict.sdp();
+  else
+    UseCounter::count(context, UseCounter::RTCSessionDescriptionInitNoSdp);
 
   return new RTCSessionDescription(WebRTCSessionDescription(type, sdp));
 }
 
 RTCSessionDescription* RTCSessionDescription::create(
     WebRTCSessionDescription webSessionDescription) {
   return new RTCSessionDescription(webSessionDescription);
 }
 
 RTCSessionDescription::RTCSessionDescription(
@@ skipping 27 matching lines @@
   else
     result.addString("sdp", sdp());
   return result.scriptValue();
 }
 
 WebRTCSessionDescription RTCSessionDescription::webSessionDescription() {
   return m_webSessionDescription;
 }
 
 }  // namespace blink