Fixed Shadow blur for transparent objects

Source/platform/graphics/GraphicsContextState.h

Index: Source/platform/graphics/GraphicsContextState.h
diff --git a/Source/platform/graphics/GraphicsContextState.h b/Source/platform/graphics/GraphicsContextState.h
index 9dbbcfc305e26c424a23ca8640dbad486ae8027f..43fd96d68f822a67de1fab0e0c80ed7b00c03cf9 100644
--- a/Source/platform/graphics/GraphicsContextState.h
+++ b/Source/platform/graphics/GraphicsContextState.h
@@ -36,6 +36,7 @@
 #include "platform/graphics/Pattern.h"
 #include "platform/graphics/StrokeData.h"
 #include "third_party/skia/include/core/SkColorFilter.h"
+#include "third_party/skia/include/core/SkImageFilter.h"
 #include "third_party/skia/include/core/SkPaint.h"
 #include "wtf/PassOwnPtr.h"
 #include "wtf/RefPtr.h"
@@ -110,6 +111,11 @@ public:
     void setDrawLooper(PassRefPtr<SkDrawLooper>);
     void clearDrawLooper();
 
+    // Shadow. (This will need tweaking if we use image filters for other things.)

[Stephen White, 2014/10/23 01:45:47]

This comment doesn't really convey much. I'd remove it.

[sugoi1, 2014/10/23 17:43:17]

Done.

+    SkImageFilter* imageFilter() const { return m_imageFilter.get(); }
+    void setImageFilter(PassRefPtr<SkImageFilter>);
+    void clearImageFilter();
+
     // Text. (See TextModeFill & friends.)
     TextDrawingModeFlags textDrawingMode() const { return m_textDrawingMode; }
     void setTextDrawingMode(TextDrawingModeFlags mode) { m_textDrawingMode = mode; }
@@ -165,6 +171,7 @@ private:
     RefPtr<Pattern> m_fillPattern;
 
     RefPtr<SkDrawLooper> m_looper;
+    RefPtr<SkImageFilter> m_imageFilter;
 
     TextDrawingModeFlags m_textDrawingMode;