Add a origin clean flag in ImageBitmap class

third_party/WebKit/Source/core/frame/ImageBitmap.h

Index: third_party/WebKit/Source/core/frame/ImageBitmap.h
diff --git a/third_party/WebKit/Source/core/frame/ImageBitmap.h b/third_party/WebKit/Source/core/frame/ImageBitmap.h
index 59fbf3362f5c6d1b4df2c660b749340cbd4c4b32..0ffd20ae15b65b166d6b56fe77c6420d5609671e 100644
--- a/third_party/WebKit/Source/core/frame/ImageBitmap.h
+++ b/third_party/WebKit/Source/core/frame/ImageBitmap.h
@@ -28,8 +28,8 @@ class CORE_EXPORT ImageBitmap final : public RefCountedWillBeGarbageCollectedFin
     DEFINE_WRAPPERTYPEINFO();
     WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(ImageBitmap);
 public:
-    static PassRefPtrWillBeRawPtr<ImageBitmap> create(HTMLImageElement*, const IntRect&);
-    static PassRefPtrWillBeRawPtr<ImageBitmap> create(HTMLVideoElement*, const IntRect&);
+    static PassRefPtrWillBeRawPtr<ImageBitmap> create(HTMLImageElement*, const IntRect&, bool originCleanFlag = true);

[Justin Novosad, 2015/12/16 03:34:35]

The value of the origin clean flag should not be an argument, it should be
inferred from the HTMLImageElement. use HTMLImageElement::wouldTaintOrigin().
This will avoid duplicating the security logic.

[xidachen, 2015/12/22 14:29:40]

Done.

+    static PassRefPtrWillBeRawPtr<ImageBitmap> create(HTMLVideoElement*, const IntRect&, bool originCleanFlag = true);

[Justin Novosad, 2015/12/16 03:34:35]

same here

[xidachen, 2015/12/22 14:29:40]

Done.

     static PassRefPtrWillBeRawPtr<ImageBitmap> create(HTMLCanvasElement*, const IntRect&);
     static PassRefPtrWillBeRawPtr<ImageBitmap> create(ImageData*, const IntRect&);
     static PassRefPtrWillBeRawPtr<ImageBitmap> create(ImageBitmap*, const IntRect&);
@@ -59,8 +59,8 @@ public:
     DECLARE_VIRTUAL_TRACE();
 
 private:
-    ImageBitmap(HTMLImageElement*, const IntRect&);
-    ImageBitmap(HTMLVideoElement*, const IntRect&);
+    ImageBitmap(HTMLImageElement*, const IntRect&, bool);
+    ImageBitmap(HTMLVideoElement*, const IntRect&, bool);
     ImageBitmap(HTMLCanvasElement*, const IntRect&);
     ImageBitmap(ImageData*, const IntRect&);
     ImageBitmap(ImageBitmap*, const IntRect&);
@@ -73,6 +73,7 @@ private:
 
     RefPtr<StaticBitmapImage> m_image;
     bool m_isNeutered = false;
+    bool m_isOriginClean = true;
 };
 
 } // namespace blink