[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 2aa2cde64ca8774a844debc49df1659f764088fa..a255dc5dcf7490107afdd1867050b771f2f2f41c 100644
--- a/Source/platform/graphics/Pattern.h
+++ b/Source/platform/graphics/Pattern.h
@@ -41,6 +41,8 @@ class SkShader;
 
 namespace blink {
 
+class DisplayList;
+
 class PLATFORM_EXPORT Pattern : public RefCounted<Pattern> {
 public:
     enum RepeatMode {
@@ -53,6 +55,8 @@ public:
 
     static PassRefPtr<Pattern> createBitmapPattern(PassRefPtr<Image> tileImage,
         RepeatMode = RepeatModeXY);
+    static PassRefPtr<Pattern> createDisplayListPattern(PassRefPtr<DisplayList>,
+        RepeatMode = RepeatModeXY);
     virtual ~Pattern();
 
     SkShader* shader();