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preparation for experimenting with them to gpu-accelerate various aspects of
chrome's drawing. In this initial patch, the files will be built, but not
called.

TEST=be sure that page rendering, and <canvas> rendering, look the same as before

Review URL: http://codereview.chromium.org/6357006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@71998 0039d316-1c4b-4281-b951-d872f2087c98