Revert of Move ScriptState::GetExecutionContext (Part 5)

third_party/WebKit/Source/modules/mediasource/URLMediaSource.cpp

 /*
  * Copyright (C) 2013 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ 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/mediasource/URLMediaSource.h"
 
 #include "bindings/core/v8/ScriptState.h"
 #include "core/dom/DOMURL.h"
-#include "core/dom/ExecutionContext.h"
 #include "core/frame/UseCounter.h"
 #include "modules/mediasource/MediaSource.h"
 
 namespace blink {
 
 String URLMediaSource::createObjectURL(ScriptState* script_state,
                                        MediaSource* source) {
   // Since WebWorkers cannot obtain MediaSource objects, we should be on the
   // main thread.
   DCHECK(IsMainThread());
-  ExecutionContext* execution_context = ExecutionContext::From(script_state);
+  ExecutionContext* execution_context = script_state->GetExecutionContext();
   DCHECK(execution_context);
   DCHECK(source);
 
   UseCounter::Count(execution_context, UseCounter::kCreateObjectURLMediaSource);
   return DOMURL::CreatePublicURL(execution_context, source);
 }
 
 }  // namespace blink