This folder holds WebView's gpu-specific code.
WebView's gpu code always runs in the browser process.
Like with other content embedders, //android_webview/gpu/
can depend on
//android_webview/common/
but not //android_webview/browser/
. It can also
depend on content layer (and lower layers) as other embedders would (ex. can
depend on //content/public/gpu/
, //content/public/common/
).