[WebView Support Library] Pass and fetch list of supported features.
am: 7a06470db3

Change-Id: If0cc6d0369d9e54b013e273ce0990c7c1d4e7b64
tree: 2ddb305b67b3a4dbeb0790a6fb5b19ad6df030c6
  1. BUILD.gn
  2. DEPS
  3. proguard.flags
  4. src/