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

third_party/WebKit/Source/modules/offscreencanvas2d/OffscreenCanvasRenderingContext2D.cpp

Index: third_party/WebKit/Source/modules/offscreencanvas2d/OffscreenCanvasRenderingContext2D.cpp
diff --git a/third_party/WebKit/Source/modules/offscreencanvas2d/OffscreenCanvasRenderingContext2D.cpp b/third_party/WebKit/Source/modules/offscreencanvas2d/OffscreenCanvasRenderingContext2D.cpp
index 47d43f04c78cec3ad322853e7b3e06c953d86407..521d5646e8bf1cf45ece4bc38ed3f673f4fe2af9 100644
--- a/third_party/WebKit/Source/modules/offscreencanvas2d/OffscreenCanvasRenderingContext2D.cpp
+++ b/third_party/WebKit/Source/modules/offscreencanvas2d/OffscreenCanvasRenderingContext2D.cpp
@@ -256,6 +256,18 @@ 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();
 }