Add a origin clean flag in ImageBitmap class

third_party/WebKit/Source/core/html/HTMLCanvasElement.cpp

Index: third_party/WebKit/Source/core/html/HTMLCanvasElement.cpp
diff --git a/third_party/WebKit/Source/core/html/HTMLCanvasElement.cpp b/third_party/WebKit/Source/core/html/HTMLCanvasElement.cpp
index 11eb39f893780a61a2d318887a1b6bf8c3fbf8b7..f830bb8fb77ebc4a7aed291e72a0cc77bd0e8803 100644
--- a/third_party/WebKit/Source/core/html/HTMLCanvasElement.cpp
+++ b/third_party/WebKit/Source/core/html/HTMLCanvasElement.cpp
@@ -118,7 +118,7 @@ PassRefPtr<Image> createTransparentImage(const IntSize& size)
     ASSERT(canCreateImageBuffer(size));
     RefPtr<SkSurface> surface = adoptRef(SkSurface::NewRasterN32Premul(size.width(), size.height()));
     surface->getCanvas()->clear(SK_ColorTRANSPARENT);
-    return StaticBitmapImage::create(adoptRef(surface->newImageSnapshot()));
+    return StaticBitmapImage::create(adoptRef(surface->newImageSnapshot()), true);
 }
 
 } // namespace
@@ -978,7 +978,7 @@ PassRefPtr<Image> HTMLCanvasElement::getSourceImageForCanvas(SourceImageStatus*
     RefPtr<SkImage> image = buffer()->newSkImageSnapshot(hint);
     if (image) {
         *status = NormalSourceImageStatus;
-        return StaticBitmapImage::create(image.release());
+        return StaticBitmapImage::create(image.release(), true);
     }
 
     *status = InvalidSourceImageStatus;
@@ -1003,10 +1003,6 @@ IntSize HTMLCanvasElement::bitmapSourceSize() const
 ScriptPromise HTMLCanvasElement::createImageBitmap(ScriptState* scriptState, EventTarget& eventTarget, int sx, int sy, int sw, int sh, ExceptionState& exceptionState)
 {
     ASSERT(eventTarget.toDOMWindow());
-    if (!originClean()) {
-        exceptionState.throwSecurityError("The canvas element provided is tainted with cross-origin data.");
-        return ScriptPromise();
-    }
     if (!sw || !sh) {
         exceptionState.throwDOMException(IndexSizeError, String::format("The source %s provided is 0.", sw ? "height" : "width"));
         return ScriptPromise();