[Mojo Video Capture] Initialize COM on Windows

[Mojo Video Capture] Initialize COM on Windows

This CL is part of the Mojo Video Capture work. For the bigger picture,
see [1] CL25_enable_win.

* Added a ScopedCOMInitializer to ServiceImpl in order to initialize COM on
  the service main thread, which is also the thread that interacts with the
  video capture devices.

BUG=584797
TEST=
  content_browsertests --gtest_filter="VideoCaptureBrowserTest.*"

[1] https://docs.google.com/a/chromium.org/document/d/1Qw7rw1AJy0QHXjha36jZNiEuxsxWslJ_X-zpOhijvI8/edit?usp=sharing

Review-Url: https://codereview.chromium.org/2897033006
Cr-Commit-Position: refs/heads/master@{#474876}
Committed: https://chromium.googlesource.com/chromium/src/+/48b7318b1de86b6c40fb6a18e45a8f330f641ba9

[chfremer, 2017-05-23 23:53:50]

The CQ bit was checked by chfremer@chromium.org to run a CQ dry run

[chfremer, 2017-05-23 23:54:03]

chfremer@chromium.org changed reviewers:
+ jam@chromium.org

[chfremer, 2017-05-23 23:54:03]

PTAL

[commit-bot: I haz the power, 2017-05-23 23:54:52]

Dry run: CQ is trying da patch.

Follow status at:
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2017-05-24 02:15:31]

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

[commit-bot: I haz the power, 2017-05-24 02:15:33]

Dry run: Try jobs failed on following builders:
  win_clang on master.tryserver.chromium.win (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.win/builders/win_clang/builds/...)

[jam, 2017-05-24 15:10:22]

lgtm

[chfremer, 2017-05-25 21:49:18]

The CQ bit was checked by chfremer@chromium.org

[chfremer, 2017-05-25 21:49:18]

The patchset sent to the CQ was uploaded after l-g-t-m from jam@chromium.org
Link to the patchset: https://codereview.chromium.org/2897033006/#ps20001
(title: "Move the |com_initializer_| to top of members")

[commit-bot: I haz the power, 2017-05-25 21:49:59]

CQ is trying da patch.

Follow status at:
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2017-05-26 02:01:12]

CQ is committing da patch.

Bot data: {"patchset_id": 20001, "attempt_start_ts": 1495748958540470,
"parent_rev": "c49b9ca07f83dee16ba33a928ee5d3dfa5dea4b8", "commit_rev":
"48b7318b1de86b6c40fb6a18e45a8f330f641ba9"}

[commit-bot: I haz the power, 2017-05-26 02:01:30]

Description was changed from

==========
[Mojo Video Capture] Initialize COM on Windows

This CL is part of the Mojo Video Capture work. For the bigger picture,
see [1] CL25_enable_win.

* Added a ScopedCOMInitializer to ServiceImpl in order to initialize COM on
  the service main thread, which is also the thread that interacts with the
  video capture devices.

BUG=584797
TEST=
  content_browsertests --gtest_filter="VideoCaptureBrowserTest.*"

[1]
https://docs.google.com/a/chromium.org/document/d/1Qw7rw1AJy0QHXjha36jZNiEuxs...
==========

to

==========
[Mojo Video Capture] Initialize COM on Windows

This CL is part of the Mojo Video Capture work. For the bigger picture,
see [1] CL25_enable_win.

* Added a ScopedCOMInitializer to ServiceImpl in order to initialize COM on
  the service main thread, which is also the thread that interacts with the
  video capture devices.

BUG=584797
TEST=
  content_browsertests --gtest_filter="VideoCaptureBrowserTest.*"

[1]
https://docs.google.com/a/chromium.org/document/d/1Qw7rw1AJy0QHXjha36jZNiEuxs...

Review-Url: https://codereview.chromium.org/2897033006
Cr-Commit-Position: refs/heads/master@{#474876}
Committed:
https://chromium.googlesource.com/chromium/src/+/48b7318b1de86b6c40fb6a18e45a...
==========

[commit-bot: I haz the power, 2017-05-26 02:01:31]

Committed patchset #2 (id:20001) as
https://chromium.googlesource.com/chromium/src/+/48b7318b1de86b6c40fb6a18e45a...