Add UseCounter for the Mozilla-style fullscreen error handling exemptions

Add UseCounter for the Mozilla-style fullscreen error handling exemptions

webkitRequestFullScreen skips some checks that webkitRequestFullscreen
and other modes have.

It is unlikely that the prefixed fullscreen APIs can be removed any time
soon, so trying to reduce the differences between them is worthwhile.

Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=177284

[falken, 2014-07-01 05:12:20]

On 2014/06/30 22:52:57, philipj wrote:

lgtm... it could be nice to make the change description more clear about what
moz legacy mode is. E.g., webkitRequestFullScreen vs webkitRequestFullscreen

[philipj_slow, 2014-07-01 07:10:14]

On 2014/07/01 05:12:20, falken wrote:
> On 2014/06/30 22:52:57, philipj wrote:
> 
> lgtm... it could be nice to make the change description more clear about what
> moz legacy mode is. E.g., webkitRequestFullScreen vs webkitRequestFullscreen

Thanks, I've tried to clarify the commit message.

[philipj_slow, 2014-07-01 07:10:18]

The CQ bit was checked by philipj@opera.com

[commit-bot: I haz the power, 2014-07-01 07:12:37]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/philipj@opera.com/363493002/1

[commit-bot: I haz the power, 2014-07-01 07:12:48]

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

[commit-bot: I haz the power, 2014-07-01 07:12:49]

Failed to apply patch for Source/core/frame/UseCounter.h:
While running patch -p1 --forward --force --no-backup-if-mismatch;
  patching file Source/core/frame/UseCounter.h
  Hunk #1 FAILED at 474.
  1 out of 1 hunk FAILED -- saving rejects to file
Source/core/frame/UseCounter.h.rej

Patch:       Source/core/frame/UseCounter.h
Index: Source/core/frame/UseCounter.h
diff --git a/Source/core/frame/UseCounter.h b/Source/core/frame/UseCounter.h
index
02258631ea70fbe5f399097f74adc329031439a5..de4f0c0fc12f1872b156aa3c6916a9be17081753
100644
--- a/Source/core/frame/UseCounter.h
+++ b/Source/core/frame/UseCounter.h
@@ -474,6 +474,7 @@ public:
 
         UseAsm = 473,
         KeyEventNotAllowedInFullScreen = 474,
+        LegacyFullScreenErrorExemption = 475,
         // Add new features immediately above this line. Don't change assigned
         // numbers of any item, and don't reuse removed slots.
         // Also, run update_use_counter_feature_enum.py in
chromium/src/tools/metrics/histograms/

[philipj_slow, 2014-07-01 07:31:39]

The CQ bit was checked by philipj@opera.com

[commit-bot: I haz the power, 2014-07-01 07:32:35]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/philipj@opera.com/363493002/20001

[commit-bot: I haz the power, 2014-07-01 08:40:33]

FYI, CQ is re-trying this CL (attempt #1).
The failing builders are:
  linux_blink_dbg on tryserver.blink
(http://build.chromium.org/p/tryserver.blink/builders/linux_blink_dbg/builds/1...)

[commit-bot: I haz the power, 2014-07-01 09:45:36]

Change committed as 177284