taking over xiyuan's patch:
http://codereview.chromium.org/10701087/
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chromeos: Fix pixelated icons in app list and launcher (part 2)
Add an ExtensionIconImage, which loads image that supports DIP
by having a special ImageSkiaSource that makes
ImageLoadingTracker to load image for additional DIP scale.
BUG=
131738,
131739
TEST=None. Wait for the last CL to update laucher/app list code to use LoadImageInDIP to verify.
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For gypi files (I reckon this part is trivial enough)
TBR=ben@chromium.org
Committed:
http://src.chromium.org/viewvc/chrome?view=rev&revision=152407