Add layer name into frame viewer

Layer name is useful for web developer to identify different layers. Layer name is pulled from blink. There is a blink side patch provides debugName() API in GraphicsLayer.

BUG=269258

Review URL: https://chromiumcodereview.appspot.com/16903005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@218007 0039d316-1c4b-4281-b951-d872f2087c98
10 files changed