Fix potential crashes in the screen capturer on Mac

Fix potential crashes in the screen capturer on Mac

ScreenCapturerMac wasn't handling the following two cases properly
which could cause crashes:
 1. CGDisplayCreateImage() returns image with depth other than 32-bit
 2. CGDisplayCreateImage() returns image with dimensions different
    from expected (e.g. when screen resolution is being changed).

I suspect that (2) was causing the linked bug.

BUG=crbug.com/504927
R=jiayl@webrtc.org

Committed: https://crrev.com/0c4de568a632395ca12c57b0600d5d64b5fc91f1
Cr-Commit-Position: refs/heads/master@{#12077}

[Sergey Ulanov, 2016-03-18 23:03:55]

sergeyu@chromium.org changed reviewers:
+ jiayl@webrtc.org

[jiayl2, 2016-03-18 23:23:51]

lgtm

[Sergey Ulanov, 2016-03-18 23:26:08]

The CQ bit was checked by sergeyu@chromium.org

[commit-bot: I haz the power, 2016-03-18 23:26:13]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1816723002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1816723002/1

[commit-bot: I haz the power, 2016-03-19 01:26:54]

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

[commit-bot: I haz the power, 2016-03-19 01:26:55]

Try jobs failed on following builders:
  android_arm64_rel on tryserver.webrtc (JOB_TIMED_OUT, no build URL)
  linux_baremetal on tryserver.webrtc (JOB_TIMED_OUT, no build URL)
  win_baremetal on tryserver.webrtc (JOB_TIMED_OUT, no build URL)

[Sergey Ulanov, 2016-03-21 18:18:57]

Description was changed from

==========
Fix potential crashes in the screen capturer on Mac

ScreenCapturerMac wasn't handling the following two cases properly
which could cause crashes:
 1. CGDisplayCreateImage() returns image with depth other than 32-bit
 2. CGDisplayCreateImage() returns image with dimensions different
    from expected (e.g. when screen resolution is being changed).

I suspect that (2) was causing the linked bug.

BUG=crbug.com/504927
==========

to

==========
Fix potential crashes in the screen capturer on Mac

ScreenCapturerMac wasn't handling the following two cases properly
which could cause crashes:
 1. CGDisplayCreateImage() returns image with depth other than 32-bit
 2. CGDisplayCreateImage() returns image with dimensions different
    from expected (e.g. when screen resolution is being changed).

I suspect that (2) was causing the linked bug.

BUG=crbug.com/504927
R=jiayl@webrtc.org

Committed:
https://chromium.googlesource.com/external/webrtc/+/0c4de568a632395ca12c57b06...
==========

[Sergey Ulanov, 2016-03-21 18:18:58]

Committed patchset #1 (id:1) manually as
0c4de568a632395ca12c57b0600d5d64b5fc91f1 (presubmit successful).

[commit-bot: I haz the power, 2016-03-21 18:18:59]

Description was changed from

==========
Fix potential crashes in the screen capturer on Mac

ScreenCapturerMac wasn't handling the following two cases properly
which could cause crashes:
 1. CGDisplayCreateImage() returns image with depth other than 32-bit
 2. CGDisplayCreateImage() returns image with dimensions different
    from expected (e.g. when screen resolution is being changed).

I suspect that (2) was causing the linked bug.

BUG=crbug.com/504927
R=jiayl@webrtc.org

Committed:
https://chromium.googlesource.com/external/webrtc/+/0c4de568a632395ca12c57b06...
==========

to

==========
Fix potential crashes in the screen capturer on Mac

ScreenCapturerMac wasn't handling the following two cases properly
which could cause crashes:
 1. CGDisplayCreateImage() returns image with depth other than 32-bit
 2. CGDisplayCreateImage() returns image with dimensions different
    from expected (e.g. when screen resolution is being changed).

I suspect that (2) was causing the linked bug.

BUG=crbug.com/504927
R=jiayl@webrtc.org

Committed: https://crrev.com/0c4de568a632395ca12c57b0600d5d64b5fc91f1
Cr-Commit-Position: refs/heads/master@{#12077}
==========

[commit-bot: I haz the power, 2016-03-21 18:19:00]

Patchset 1 (id:??) landed as
https://crrev.com/0c4de568a632395ca12c57b0600d5d64b5fc91f1
Cr-Commit-Position: refs/heads/master@{#12077}