Revert of Move ScriptState::GetExecutionContext (Part 5)

third_party/WebKit/Source/modules/offscreencanvas/OffscreenCanvasModules.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/offscreencanvas/OffscreenCanvasModules.h"
 
-#include "core/dom/ExecutionContext.h"
 #include "core/html/canvas/CanvasContextCreationAttributes.h"
 #include "core/offscreencanvas/OffscreenCanvas.h"
 #include "modules/offscreencanvas2d/OffscreenCanvasRenderingContext2D.h"
 
 namespace blink {
 
 void OffscreenCanvasModules::getContext(
     ScriptState* script_state,
     OffscreenCanvas& offscreen_canvas,
     const String& id,
     const CanvasContextCreationAttributes& attributes,
     ExceptionState& exception_state,
     OffscreenRenderingContext& result) {
   if (offscreen_canvas.IsNeutered()) {
     exception_state.ThrowDOMException(kInvalidStateError,
                                       "OffscreenCanvas object is detached");
     return;
   }
 
   // OffscreenCanvas cannot be transferred after getContext, so this execution
   // context will always be the right one from here on.
-  offscreen_canvas.SetExecutionContext(ExecutionContext::From(script_state));
+  offscreen_canvas.SetExecutionContext(script_state->GetExecutionContext());
   CanvasRenderingContext* context =
       offscreen_canvas.GetCanvasRenderingContext(script_state, id, attributes);
   if (context)
     context->SetOffscreenCanvasGetContextResult(result);
 }
 
 }  // namespace blink