Add some plumbing for the color management of canvases

third_party/WebKit/Source/modules/imagebitmap/ImageBitmapRenderingContext.cpp

Index: third_party/WebKit/Source/modules/imagebitmap/ImageBitmapRenderingContext.cpp
diff --git a/third_party/WebKit/Source/modules/imagebitmap/ImageBitmapRenderingContext.cpp b/third_party/WebKit/Source/modules/imagebitmap/ImageBitmapRenderingContext.cpp
index 20b6491e85010f2bf0c79c649415f7e6e0351a80..8cb74652cdba6392f6e968cded2af9bb19fd97d7 100644
--- a/third_party/WebKit/Source/modules/imagebitmap/ImageBitmapRenderingContext.cpp
+++ b/third_party/WebKit/Source/modules/imagebitmap/ImageBitmapRenderingContext.cpp
@@ -13,9 +13,8 @@
 
 namespace blink {
 
-ImageBitmapRenderingContext::ImageBitmapRenderingContext(HTMLCanvasElement* canvas, CanvasContextCreationAttributes attrs, Document& document)
-    : CanvasRenderingContext(canvas)
-    , m_hasAlpha(attrs.alpha())
+ImageBitmapRenderingContext::ImageBitmapRenderingContext(HTMLCanvasElement* canvas, const CanvasContextCreationAttributes& attrs, Document& document)
+    : CanvasRenderingContext(canvas, nullptr, attrs)
 { }
 
 ImageBitmapRenderingContext::~ImageBitmapRenderingContext() { }
@@ -53,7 +52,7 @@ bool ImageBitmapRenderingContext::paint(GraphicsContext& gc, const IntRect& r)
 
     // With impl-side painting, it is unsafe to use a gpu-backed SkImage
     ASSERT(!m_image->imageForCurrentFrame()->isTextureBacked());
-    gc.drawImage(m_image.get(), r, nullptr, m_hasAlpha ? SkXfermode::kSrcOver_Mode : SkXfermode::kSrc_Mode);
+    gc.drawImage(m_image.get(), r, nullptr, creationAttributes().alpha() ? SkXfermode::kSrcOver_Mode : SkXfermode::kSrc_Mode);
 
     return true;
 }