Add WebRuntimeFeatures::enablePermissionsAPI.

Add WebRuntimeFeatures::enablePermissionsAPI.

Add the ability to control whether we want to expose the Permissions API
in blink at runtime. This is e.g. needed for WebView where the
Permissions API is currently not supported.

BUG=489926
TBR=dglazkov
NOTRY=true

Review URL: https://codereview.chromium.org/1150653002

git-svn-id: svn://svn.chromium.org/blink/trunk@195691 bbb929c8-8fbe-4397-9dbb-9b2b20218538
(cherry picked from commit 867b90077485d07fc4dc60de24112bdad2085e6a)

Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=195998

[timvolodine, 2015-05-27 17:37:11]

The CQ bit was checked by timvolodine@chromium.org

[commit-bot: I haz the power, 2015-05-27 17:37:29]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1156113007/1

[commit-bot: I haz the power, 2015-05-27 17:52:27]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2015-05-27 17:52:27]

Try jobs failed on following builders:
  linux_chromium_gn_rel on tryserver.blink (JOB_FAILED,
http://build.chromium.org/p/tryserver.blink/builders/linux_chromium_gn_rel/bu...)

[timvolodine, 2015-05-27 17:58:21]

The CQ bit was checked by timvolodine@chromium.org

[commit-bot: I haz the power, 2015-05-27 17:59:22]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1156113007/1

[commit-bot: I haz the power, 2015-05-27 18:04:21]

Committed patchset #1 (id:1) as
https://src.chromium.org/viewvc/blink?view=rev&revision=195998

[Noel Gordon, 2015-05-27 18:32:28]

Tim, trys all turing red after this patch. Expected?

[timvolodine, 2015-05-27 18:35:01]

On 2015/05/27 18:32:28, noel gordon wrote:
> Tim, trys all turing red after this patch. Expected?

Hi, yes this is because this is a merge to M33 and the bots run with the head
blink revision hence no compile. should have run them in the first place ;/

[samuong, 2015-05-27 18:35:10]

A revert of this CL (patchset #1 id:1) has been created in
https://codereview.chromium.org/1157773005/ by samuong@chromium.org.

The reason for reverting is: This change has been applied twice, and is causing
compile failures on the following bots (and probably more):

http://build.chromium.org/p/chromium.webkit/builders/WebKit%20Win%20Builder/b...
http://build.chromium.org/p/chromium.webkit/builders/WebKit%20Win%20Builder%2...
http://build.chromium.org/p/chromium.webkit/builders/Linux%20GN/builds/32401

Was this supposed to land on a different branch?.

[timvolodine, 2015-05-27 18:42:27]

On 2015/05/27 18:35:10, samuong wrote:
> A revert of this CL (patchset #1 id:1) has been created in
> https://codereview.chromium.org/1157773005/ by mailto:samuong@chromium.org.
> 
> The reason for reverting is: This change has been applied twice, and is
causing
> compile failures on the following bots (and probably more):
> 
>
http://build.chromium.org/p/chromium.webkit/builders/WebKit%20Win%20Builder/b...
>
http://build.chromium.org/p/chromium.webkit/builders/WebKit%20Win%20Builder%2...
> http://build.chromium.org/p/chromium.webkit/builders/Linux%20GN/builds/32401
> 
> Was this supposed to land on a different branch?.

oops yes sorry something went wrong, the base url is wrong this was meant for
M43 (2357)