Fix racing which may pause gpu process's interface registry forever

Fix racing which may pause gpu process's interface registry forever

AcceptConnection and OnInitialize are racing. Only pause the interface
registry if OnInitialize is not invoked.

TEST=arc video playback well
BUG=620845
Review-Url: https://codereview.chromium.org/2112493003
Cr-Commit-Position: refs/heads/master@{#403185}
(cherry picked from commit baef2ce0540b155429c40995bd88000bb9b6487f)

Committed: https://chromium.googlesource.com/chromium/src/+/380808c5d58d14b23a3c4673e8c7bc6940ccaafc

[gkihumba, 2016-06-30 19:24:17]

Description was changed from

==========
Fix racing which may pause gpu process's interface registry forever

AcceptConnection and OnInitialize are racing. Only pause the interface
registry if OnInitialize is not invoked.

TEST=arc video playback well
BUG=620845

Review-Url: https://codereview.chromium.org/2112493003
Cr-Commit-Position: refs/heads/master@{#403185}
(cherry picked from commit baef2ce0540b155429c40995bd88000bb9b6487f)
==========

to

==========
Fix racing which may pause gpu process's interface registry forever

AcceptConnection and OnInitialize are racing. Only pause the interface
registry if OnInitialize is not invoked.

TEST=arc video playback well
BUG=620845

Review-Url: https://codereview.chromium.org/2112493003
Cr-Commit-Position: refs/heads/master@{#403185}
(cherry picked from commit baef2ce0540b155429c40995bd88000bb9b6487f)

Committed:
https://chromium.googlesource.com/chromium/src/+/380808c5d58d14b23a3c4673e8c7...
==========

[gkihumba, 2016-06-30 19:24:18]

Committed patchset #1 (id:1) manually as
380808c5d58d14b23a3c4673e8c7bc6940ccaafc.