Hixie 6ed5b43877 Instead of applying a transform for every RenderObject, pass down an Offset for where to paint.
This should be a perf win, but I haven't tested it.

Also adds an operator overloading such that Offset + Size -> Rect.
Also adds Rect.fromLTWH().

R=abarth@chromium.org

Review URL: https://codereview.chromium.org/1209413004.
2015-06-29 09:07:13 -07:00
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