Revert of Move ScriptState::GetExecutionContext (Part 5)

third_party/WebKit/Source/modules/mediasession/NavigatorMediaSession.cpp

 // Copyright 2016 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 "modules/mediasession/NavigatorMediaSession.h"
 
 #include "bindings/core/v8/ScriptState.h"
-#include "core/dom/ExecutionContext.h"
 #include "modules/mediasession/MediaSession.h"
 #include "platform/Supplementable.h"
 
 namespace blink {
 
 NavigatorMediaSession::NavigatorMediaSession(Navigator& navigator)
     : Supplement<Navigator>(navigator) {}
 
 DEFINE_TRACE(NavigatorMediaSession) {
   visitor->Trace(session_);
@@ skipping 11 matching lines @@
     supplement = new NavigatorMediaSession(navigator);
     ProvideTo(navigator, SupplementName(), supplement);
   }
   return *supplement;
 }
 
 MediaSession* NavigatorMediaSession::mediaSession(ScriptState* script_state,
                                                   Navigator& navigator) {
   NavigatorMediaSession& self = NavigatorMediaSession::From(navigator);
   if (!self.session_)
-    self.session_ = MediaSession::Create(ExecutionContext::From(script_state));
+    self.session_ = MediaSession::Create(script_state->GetExecutionContext());
   return self.session_.Get();
 }
 
 }  // namespace blink