Pass InterpolationQuality into DragImage to respect image-rendering:pixelated.

Source/platform/DragImage.h

Index: Source/platform/DragImage.h
diff --git a/Source/platform/DragImage.h b/Source/platform/DragImage.h
index 9abdf5f7696bf5fc499391fa260e3c4adfda7c8b..81bd5ac15f9defbf9c3d88dd21ab26040710d36a 100644
--- a/Source/platform/DragImage.h
+++ b/Source/platform/DragImage.h
@@ -29,6 +29,7 @@
 #include "platform/geometry/IntSize.h"
 #include "platform/graphics/ImageOrientation.h"
 #include "platform/graphics/paint/DisplayItemClient.h"
+#include "skia/ext/image_operations.h"

[Justin Novosad, 2015/02/05 05:06:24]

I realize this dependency is not new to this patch (the cpp file already has
it), but this is an obvious layering violation. You must not use include files
from chromium in blink.  There are two ways around this:
a) use skia directly instead of using chromium's skia wrappers. Blink has it's
own graphics helpers and utilities in Source/platform/graphics.
b) use a dependency inversion pattern to call into chromium the legal way
(example: blink::Platform vs BlinkPlatformImpl)
If we start being cavalier about circular dependencies between blink and
chromium, someday we are going to have a bad time.

I don't want to block this CL on resolving the bad dependency, but I would like
you to avoid spreading it any further. For now, could you just make this
interface use blink's InterpolationQuality enum or skia's SkPaint::FilterLevel?

[jackhou1, 2015/02/10 01:53:56]

Done.

 #include "third_party/skia/include/core/SkBitmap.h"
 #include "wtf/Forward.h"
 
@@ -40,7 +41,9 @@ class KURL;
 
 class PLATFORM_EXPORT DragImage {
 public:
-    static PassOwnPtr<DragImage> create(Image*, RespectImageOrientationEnum = DoNotRespectImageOrientation, float deviceScaleFactor = 1);
+    typedef skia::ImageOperations::ResizeMethod ResizeMethod;
+
+    static PassOwnPtr<DragImage> create(Image*, RespectImageOrientationEnum = DoNotRespectImageOrientation, float deviceScaleFactor = 1, ResizeMethod = ResizeMethod::RESIZE_LANCZOS3);
     static PassOwnPtr<DragImage> create(const KURL&, const String& label, const FontDescription& systemFont, float deviceScaleFactor);
     ~DragImage();
 
@@ -53,12 +56,13 @@ public:
     void dissolveToFraction(float fraction);
 
 private:
-    DragImage(const SkBitmap&, float resolutionScale);
+    DragImage(const SkBitmap&, float resolutionScale, ResizeMethod);
 
     DisplayItemClient displayItemClient() const { return toDisplayItemClient(this); }
 
     SkBitmap m_bitmap;
     float m_resolutionScale;
+    ResizeMethod m_resizeMethod;
 };
 
 }