Add InputEvent and EventPacket types for batched input delivery
With the BufferedInputRouter, browser input events will be batched into packets
before being sent to the renderer. Add a common InputEvent type that provides
id'ed carriage of either WebInputEvents or general IPC input messages. Also add
a composite EventPacket type for batched InputEvent transport and dispatch.
BUG=245499
Review URL: https://chromiumcodereview.appspot.com/
19624005
git-svn-id: svn://svn.chromium.org/chrome/trunk/src@221905 0039d316-1c4b-4281-b951-d872f2087c98