skia: r1763->r1769
skia: r1763->r1769

r1769: Adding the notion of a volatile bitmap to SkBitmap.
r1768: Roll gyp version from 907 to 936
r1767: Fix bug where equality was used instead of assignment.
r1766: SkStringPrintf helper fucntion + a new unit test for it.
r1765: Fix LCD text filtering
r1764: Fix build for old versions of freetype without FT_Library_SetLcdFilter

Review URL: http://codereview.chromium.org/7292004

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@91191 0039d316-1c4b-4281-b951-d872f2087c98

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