Merge third_party/skia/src from https://chromium.googlesource.com/external/skia/src.git at 0df451d5563e6536af9bd328e31d4b6ed4dbc07c

This commit was generated by merge_from_chromium.py.

Change-Id: I0e0b91322126fd3f72f3245fbdd44e5e2d25c60e