Split Dictionary's get and convert into DictionaryHelper.

Source/modules/mediastream/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 "config.h"
 #include "modules/mediastream/RTCSessionDescription.h"
 
 #include "bindings/core/v8/Dictionary.h"
+#include "bindings/core/v8/DictionaryHelper.h"
 #include "bindings/core/v8/ExceptionState.h"
 #include "core/dom/ExceptionCode.h"
 
 namespace WebCore {
 
 static bool verifyType(const String& type)
 {
     return type == "offer" || type == "pranswer" || type == "answer";
 }
 
 static String constructIllegalTypeExceptionMessage(const String& type)
 {
     return "Illegal value of attribute 'type' : " + type;
 }
 
 RTCSessionDescription* RTCSessionDescription::create(const Dictionary& descriptionInitDict, ExceptionState& exceptionState)
 {
     String type;
-    bool ok = descriptionInitDict.get("type", type);
+    bool ok = DictionaryHelper::get(descriptionInitDict, "type", type);
     if (ok && !verifyType(type)) {
         exceptionState.throwDOMException(TypeMismatchError, constructIllegalTypeExceptionMessage(type));
         return nullptr;
     }
 
     String sdp;
-    descriptionInitDict.get("sdp", sdp);
+    DictionaryHelper::get(descriptionInitDict, "sdp", sdp);
 
     return new RTCSessionDescription(blink::WebRTCSessionDescription(type, sdp));
 }
 
 RTCSessionDescription* RTCSessionDescription::create(blink::WebRTCSessionDescription webSessionDescription)
 {
     return new RTCSessionDescription(webSessionDescription);
 }
 
 RTCSessionDescription::RTCSessionDescription(blink::WebRTCSessionDescription webSessionDescription)
@@ skipping 24 matching lines @@
 {
     m_webSessionDescription.setSDP(sdp);
 }
 
 blink::WebRTCSessionDescription RTCSessionDescription::webSessionDescription()
 {
     return m_webSessionDescription;
 }
 
 } // namespace WebCore