Introduce an "ExtensionWantsToAct" method

Introduce an "ExtensionWantsToAct" method

Add an ExtensionWantsToAct() method on ExtensionActionAPI.
Even though we're not quite sure what we want the UI to look
like for an extension desiring to act, we can start a little
bit of the plumbing now. For instance, exposing a method that
allows a caller to check if an extension wants to act on a
given page.

BUG=417441
Committed: https://crrev.com/699ca6ff2ee26ba1fbac5532c75d25175dcf6884
Cr-Commit-Position: refs/heads/master@{#297309}

[Devlin, 2014-09-26 00:19:03]

Patchset #1 (id:1) has been deleted

[Devlin, 2014-09-26 00:22:05]

rdevlin.cronin@chromium.org changed reviewers:
+ finnur@chromium.org

[Finnur, 2014-09-26 09:53:34]

LGTM, with one small question addressed.

https://codereview.chromium.org/597413003/diff/20001/chrome/browser/extension...
File chrome/browser/extensions/location_bar_controller_unittest.cc (right):

https://codereview.chromium.org/597413003/diff/20001/chrome/browser/extension...
chrome/browser/extensions/location_bar_controller_unittest.cc:166:
extension_action_api->ExtensionWantsToRun(extension, web_contents());
EXPECT_FALSE?

[Devlin, 2014-09-29 22:56:52]

https://codereview.chromium.org/597413003/diff/20001/chrome/browser/extension...
File chrome/browser/extensions/location_bar_controller_unittest.cc (right):

https://codereview.chromium.org/597413003/diff/20001/chrome/browser/extension...
chrome/browser/extensions/location_bar_controller_unittest.cc:166:
extension_action_api->ExtensionWantsToRun(extension, web_contents());
On 2014/09/26 09:53:33, Finnur wrote:
> EXPECT_FALSE?

Done.

[Devlin, 2014-09-29 22:56:56]

The CQ bit was checked by rdevlin.cronin@chromium.org

[commit-bot: I haz the power, 2014-09-29 22:57:48]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/597413003/60001

[commit-bot: I haz the power, 2014-09-30 00:00:05]

Committed patchset #3 (id:60001) as 0e9642c12f453165649ad8db8c24d6374643f33f

[commit-bot: I haz the power, 2014-09-30 00:01:01]

Patchset 3 (id:??) landed as
https://crrev.com/699ca6ff2ee26ba1fbac5532c75d25175dcf6884
Cr-Commit-Position: refs/heads/master@{#297309}