[SVG] DisplayList-based patterns.

Source/platform/graphics/Pattern.h

Index: Source/platform/graphics/Pattern.h
diff --git a/Source/platform/graphics/Pattern.h b/Source/platform/graphics/Pattern.h
index c8010f6875eedbc9fc06f97d74c2842c08329ee6..a2ecdeb442ba914719685149b238a6564157b234 100644
--- a/Source/platform/graphics/Pattern.h
+++ b/Source/platform/graphics/Pattern.h
@@ -29,17 +29,21 @@
 #ifndef Pattern_h
 #define Pattern_h
 
-#include "SkShader.h"
 #include "platform/PlatformExport.h"
-#include "platform/graphics/Image.h"
 #include "platform/transforms/AffineTransform.h"
 
 #include "wtf/PassRefPtr.h"
 #include "wtf/RefCounted.h"
 #include "wtf/RefPtr.h"
 
+class SkShader;
+
 namespace blink {
 
+class DisplayList;
+class Image;
+class NativeImageSkia;
+
 class PLATFORM_EXPORT Pattern : public RefCounted<Pattern> {
 public:
     enum RepeatMode {
@@ -52,6 +56,8 @@ public:
 
     static PassRefPtr<Pattern> createBitmapPattern(PassRefPtr<Image> tileImage,
         RepeatMode = RepeatModeXY);
+    static PassRefPtr<Pattern> createDisplayListPattern(PassRefPtr<DisplayList>,
+        RepeatMode = RepeatModeXY);
     ~Pattern();
 
     SkShader* shader();
@@ -60,8 +66,10 @@ public:
 
 private:
     Pattern(PassRefPtr<Image>, RepeatMode);
+    Pattern(PassRefPtr<DisplayList>, RepeatMode);
 
     RefPtr<NativeImageSkia> m_tileImage;
+    RefPtr<DisplayList> m_tileDisplayList;
     RepeatMode m_repeatMode;
     AffineTransform m_patternSpaceTransformation;
     RefPtr<SkShader> m_pattern;