[SVG] DisplayList-based patterns.

Source/platform/graphics/Pattern.cpp

Index: Source/platform/graphics/Pattern.cpp
diff --git a/Source/platform/graphics/Pattern.cpp b/Source/platform/graphics/Pattern.cpp
index 932c17c4fb9025034cf9d0b4d3653ce86ae18395..518d83ae6386227d711bb2ff480ded86c4321c57 100644
--- a/Source/platform/graphics/Pattern.cpp
+++ b/Source/platform/graphics/Pattern.cpp
@@ -29,6 +29,8 @@
 #include "platform/graphics/Pattern.h"
 
 #include "platform/graphics/BitmapPattern.h"
+#include "platform/graphics/DisplayList.h"
+#include "platform/graphics/DisplayListPattern.h"
 #include "platform/graphics/StaticBitmapPattern.h"
 #include "third_party/skia/include/core/SkImage.h"
 #include "third_party/skia/include/core/SkShader.h"
@@ -44,6 +46,12 @@ PassRefPtr<Pattern> Pattern::createBitmapPattern(PassRefPtr<Image> tileImage, Re
     return BitmapPattern::create(tileImage, repeatMode);
 }
 
+PassRefPtr<Pattern> Pattern::createDisplayListPattern(PassRefPtr<DisplayList> displayList,
+    RepeatMode repeatMode)
+{
+    return DisplayListPattern::create(displayList, repeatMode);
+}
+
 Pattern::Pattern(RepeatMode repeatMode, int64_t externalMemoryAllocated)
     : m_repeatMode(repeatMode)
     , m_externalMemoryAllocated(0)