Do not check for browser side navigation when loading a data url

Do not check for browser side navigation when loading a data url

This CL makes it so that the request created by WebLocalFrame::loadData will
not attempt to send the request to the browser when browser-side navigation is
enabled. This is because this function is called when the navigation needs to
be committed in the renderer. See https://codereview.chromium.org/906283003/
for the Chromium side CL for handling data urls.

BUG=459033
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=190919

[clamy, 2015-02-20 17:03:55]

clamy@chromium.org changed reviewers:
+ creis@chromium.org, japhet@chromium.org

[clamy, 2015-02-20 17:04:30]

@japhet, creis: PTAL. This makes sure we can load data urls when PlzNavigate is
enabled.

[Charlie Reis, 2015-02-20 22:11:55]

LGTM

[clamy, 2015-02-26 13:26:45]

clamy@chromium.org changed reviewers:
+ mkwst@chromium.org

[clamy, 2015-02-26 13:26:56]

@mkwst: PTAL

[Mike West, 2015-02-26 13:38:01]

LGTM.

[clamy, 2015-02-26 13:38:46]

The CQ bit was checked by clamy@chromium.org

[commit-bot: I haz the power, 2015-02-26 13:39:21]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/927653005/1

[commit-bot: I haz the power, 2015-02-26 14:47:48]

Committed patchset #1 (id:1) as
https://src.chromium.org/viewvc/blink?view=rev&revision=190919