Decrease call sites of ScriptState::current()

Source/modules/push_messaging/PushManager.h

 // Copyright 2014 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.
 
 #ifndef PushManager_h
 #define PushManager_h
 
 #include "bindings/v8/ScriptWrappable.h"
 #include "platform/heap/Handle.h"
 #include "wtf/text/WTFString.h"
 
 namespace WebCore {
 
 class ExecutionContext;
 class ScriptPromise;
+class ScriptState;
 
 class PushManager FINAL : public GarbageCollectedFinalized<PushManager>, public ScriptWrappable {
 public:
     static PushManager* create()
     {
         return new PushManager();
     }
     virtual ~PushManager();
 
-    ScriptPromise registerPushMessaging(ExecutionContext*, const String& senderId);
+    ScriptPromise registerPushMessaging(ScriptState*, const String& senderId);
 
     void trace(Visitor*) { }
 
 private:
     PushManager();
 };
 
 } // namespace WebCore
 
 #endif // PushManager_h