[SVG] DisplayList-based patterns.

Source/platform/graphics/GraphicsContext.cpp

Index: Source/platform/graphics/GraphicsContext.cpp
diff --git a/Source/platform/graphics/GraphicsContext.cpp b/Source/platform/graphics/GraphicsContext.cpp
index 902e2b7c02c572b40fb3acff3692427265453676..f8a466adb2fa8e47bb3ed49f5ceb1a8b54dc343f 100644
--- a/Source/platform/graphics/GraphicsContext.cpp
+++ b/Source/platform/graphics/GraphicsContext.cpp
@@ -507,6 +507,10 @@ void GraphicsContext::beginRecording(const FloatRect& bounds)
 
         // We want the bounds offset mapped to (0, 0), such that the display list content
         // is fully contained within the SkPictureRecord's bounds.
+        // FIXME: we record this translation *in the picture*, and compensate externally in
+        // drawDisplayList(). But if the picture is passed to an unaware consumer, this info
+        // is lost. I don't think we have to record the translation, we should investigate
+        // extracting it out of the picture.
         if (!toFloatSize(bounds.location()).isZero()) {
             m_canvas->translate(-bounds.x(), -bounds.y());
             // To avoid applying the offset repeatedly in getTotalMatrix(), we pre-apply it here.