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This re-rasters GPU-rasterized layers during scale animations in order to
keep content crisp, but only for layers that don't have text (since
re-rastering text at different scales leads to expensive glyph texture
uploads at each scale).

BUG=395760,372391

Review URL: https://codereview.chromium.org/422233008

Cr-Commit-Position: refs/heads/master@{#291068}
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@291068 0039d316-1c4b-4281-b951-d872f2087c98