Merge third_party/skia/gyp from https://chromium.googlesource.com/external/skia/gyp.git at b62fec7fcb34f152a209dc2184c8f89f4b80b75c

This commit was generated by merge_from_chromium.py.

Change-Id: I966e6e4fcb95060ff33b7df1ca9966b8e1ba9149