Fix BaseRenderingContext2D create/put/get-ImageData() for color managed canvas

third_party/WebKit/Source/modules/offscreencanvas2d/OffscreenCanvasRenderingContext2D.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/offscreencanvas2d/OffscreenCanvasRenderingContext2D.h"
 
 #include "bindings/modules/v8/OffscreenCanvasRenderingContext2DOrWebGLRenderingContextOrWebGL2RenderingContext.h"
 #include "core/dom/ExecutionContext.h"
 #include "core/frame/ImageBitmap.h"
 #include "core/frame/Settings.h"
@@ skipping 238 matching lines @@
 }
 
 bool OffscreenCanvasRenderingContext2D::isContextLost() const {
   return false;
 }
 
 bool OffscreenCanvasRenderingContext2D::IsPaintable() const {
   return this->GetImageBuffer();
 }
 
+CanvasColorSpace OffscreenCanvasRenderingContext2D::ColorSpace() const {
+  return CanvasRenderingContext::ColorSpace();
+}
+
+String OffscreenCanvasRenderingContext2D::ColorSpaceAsString() const {
+  return CanvasRenderingContext::ColorSpaceAsString();
+}
+
+CanvasPixelFormat OffscreenCanvasRenderingContext2D::PixelFormat() const {
+  return CanvasRenderingContext::PixelFormat();
+}
+
 bool OffscreenCanvasRenderingContext2D::IsAccelerated() const {
   return image_buffer_ && image_buffer_->IsAccelerated();
 }
 }