[SVG] DisplayList-based patterns.

Source/platform/graphics/DisplayListPattern.h

+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef DisplayListPattern_h
+#define DisplayListPattern_h
+
+#include "platform/graphics/Pattern.h"
+
+namespace blink {
+
+class DisplayList;
+
+class PLATFORM_EXPORT DisplayListPattern : public Pattern {
+public:
+    static PassRefPtr<DisplayListPattern> create(PassRefPtr<DisplayList> displayList,
+        RepeatMode repeatMode)
+    {
+        return adoptRef(new DisplayListPattern(displayList, repeatMode));
+    }
+
+    virtual ~DisplayListPattern();
+
+    virtual PassRefPtr<SkShader> createShader() override;

[fs, 2014/10/21 20:12:35]

No strong reason for having this public I think (it'll only ever be called
through the super-class?)

[f(malita), 2014/10/21 22:16:33]

Oh yeah - done. Also updated BitmapPatternBase, BitmapPattern &
StaticBitmapPattern.

+
+private:
+    DisplayListPattern(PassRefPtr<DisplayList>, RepeatMode);
+
+    RefPtr<DisplayList> m_tileDisplayList;
+};
+
+} // namespace
+
+#endif