Tentatively enable 2 WebRtcBrowserTest tests.

The timeout issue should hopefully be fixed by r253982 and r254487.
Try to enable WebRtcBrowserTest.CanSetupAudioAndVideoCall
and WebRtcBrowserTest.CanSetupVideoCall to see the result.
If it works, more tests will be enabled later.

BUG=346721
R=phoglund@chromium.org

Review URL: https://codereview.chromium.org/178583009

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@254539 0039d316-1c4b-4281-b951-d872f2087c98
Mojo: add scaffolding for request/response support

Introduces MessageHeaderWithRequestID, which extends MessageHeader, and a corresponding MessageWithRequestIDBuilder.

Adds an AcceptWithResponder method to MessageReceiver. The idea is that this will be used by generated proxy code to kick off a request that expects a response. Somehow we will bind a user supplied callback to a MessageReceiver::Accept implementation. Details TBD.

Internally, Connector might get broken down into two layers: a core pump layer (the code that currently exists) and a router layer that'll be responsible for routing incoming messages to the proper MessageReceiver, either a registered responder or the default incoming receiver.

R=davemoore@chromium.org

Review URL: https://codereview.chromium.org/185803002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@254541 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 254539
Convert Google Now's use of chrome.storage.local.get to use Promises

BUG=164227
R=rgustafson@chromium.org, skare@chromium.org, vadimt@chromium.org

Review URL: https://codereview.chromium.org/166033010

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@254542 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 254542