Disallow resizing on OffscreenCanvas that has been transferred control from canvas

third_party/WebKit/Source/core/offscreencanvas/OffscreenCanvas.h

 // Copyright 2015 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 OffscreenCanvas_h
 #define OffscreenCanvas_h
 
 #include "bindings/core/v8/ScriptPromise.h"
 #include "bindings/core/v8/ScriptState.h"
 #include "bindings/core/v8/ScriptWrappable.h"
@@ skipping 12 matching lines @@
 typedef OffscreenCanvasRenderingContext2DOrWebGLRenderingContextOrWebGL2RenderingContext OffscreenRenderingContext;
 
 class CORE_EXPORT OffscreenCanvas final : public GarbageCollectedFinalized<OffscreenCanvas>, public ScriptWrappable, public CanvasImageSource {
     DEFINE_WRAPPERTYPEINFO();
 public:
     static OffscreenCanvas* create(unsigned width, unsigned height);
 
     // IDL attributes
     unsigned width() const { return m_size.width(); }
     unsigned height() const { return m_size.height(); }
-    void setWidth(unsigned);
-    void setHeight(unsigned);
+    void setWidth(unsigned, ExceptionState&);
+    void setHeight(unsigned, ExceptionState&);
 
     // API Methods
     ImageBitmap* transferToImageBitmap(ExceptionState&);
 
     IntSize size() const { return m_size; }
     void setAssociatedCanvasId(int canvasId) { m_canvasId = canvasId; }
     int getAssociatedCanvasId() const { return m_canvasId; }
     bool isNeutered() const { return m_isNeutered; }
     void setNeutered();
     CanvasRenderingContext* getCanvasRenderingContext(ScriptState*, const String&, const CanvasContextCreationAttributes&);
@@ skipping 52 matching lines @@
     // If this object is not created via HTMLCanvasElement.transferControlToOffscreen(),
     // then the following members would remain as initialized zero values.
     uint32_t m_clientId = 0;
     uint32_t m_localId = 0;
     uint64_t m_nonce = 0;
 };
 
 } // namespace blink
 
 #endif // OffscreenCanvas_h