Revert of Enable checking GN missing headers on CQ and waterfall

Revert of Enable checking GN missing headers on CQ and waterfall (patchset #3 id:40001 of https://codereview.chromium.org/2910603002/ )

Reason for revert:
The false negative rate of step check_gn_headers on CQ is higher than expected. Disable it to ease waterfall breakage.

BUG=733500
Original issue's description:
> Enable checking GN missing headers on CQ and waterfall
> 
> This relands the rest of crrev.com/2903733004.
> 
> Step "check_gn_headers" is enabled on the following bots on CQ:
> - linux_chromium_dbg_ng
> - linux_chromium_rel_ng
> 
> And also on the following builders on waterfall:
> - Linux Builder
> - Linux Builder (dbg)
> 
> Note that this script can only be added to bots that have "all"
> in "additional_compile_targets".
> 
> BUG=661774, 725877
> 
> Review-Url: https://codereview.chromium.org/2910603002
> Cr-Commit-Position: refs/heads/master@{#477058}
> Committed: https://chromium.googlesource.com/chromium/src/+/00f2b7ed28e3d1d864943497d6aa865ef1cde5e2

TBR=dpranke@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=661774, 725877
Review-Url: https://codereview.chromium.org/2940383002
Cr-Commit-Position: refs/heads/master@{#480218}
Committed: https://chromium.googlesource.com/chromium/src/+/d8b1ec3835eee2daddcae4c292f9a87683c20001

[wychen, 2017-06-16 21:56:30]

The CQ bit was checked by wychen@chromium.org

[wychen, 2017-06-16 21:56:31]

Created Revert of Enable checking GN missing headers on CQ and waterfall

[commit-bot: I haz the power, 2017-06-16 21:56:53]

CQ is trying da patch.

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

[Dirk Pranke, 2017-06-16 22:16:51]

lgtm

[commit-bot: I haz the power, 2017-06-16 23:33:21]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1497650190810190, "parent_rev":
"a6809f51d4e4a2bd48dd5886df52a60b08bc053e", "commit_rev":
"d8b1ec3835eee2daddcae4c292f9a87683c20001"}

[commit-bot: I haz the power, 2017-06-16 23:33:33]

Description was changed from

==========
Revert of Enable checking GN missing headers on CQ and waterfall (patchset #3
id:40001 of https://codereview.chromium.org/2910603002/ )

Reason for revert:
The false negative rate of step check_gn_headers on CQ is higher than expected.
Disable it to ease waterfall breakage.

BUG=733500

Original issue's description:
> Enable checking GN missing headers on CQ and waterfall
> 
> This relands the rest of crrev.com/2903733004.
> 
> Step "check_gn_headers" is enabled on the following bots on CQ:
> - linux_chromium_dbg_ng
> - linux_chromium_rel_ng
> 
> And also on the following builders on waterfall:
> - Linux Builder
> - Linux Builder (dbg)
> 
> Note that this script can only be added to bots that have "all"
> in "additional_compile_targets".
> 
> BUG=661774, 725877
> 
> Review-Url: https://codereview.chromium.org/2910603002
> Cr-Commit-Position: refs/heads/master@{#477058}
> Committed:
https://chromium.googlesource.com/chromium/src/+/00f2b7ed28e3d1d864943497d6aa...

TBR=dpranke@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=661774, 725877
==========

to

==========
Revert of Enable checking GN missing headers on CQ and waterfall (patchset #3
id:40001 of https://codereview.chromium.org/2910603002/ )

Reason for revert:
The false negative rate of step check_gn_headers on CQ is higher than expected.
Disable it to ease waterfall breakage.

BUG=733500

Original issue's description:
> Enable checking GN missing headers on CQ and waterfall
> 
> This relands the rest of crrev.com/2903733004.
> 
> Step "check_gn_headers" is enabled on the following bots on CQ:
> - linux_chromium_dbg_ng
> - linux_chromium_rel_ng
> 
> And also on the following builders on waterfall:
> - Linux Builder
> - Linux Builder (dbg)
> 
> Note that this script can only be added to bots that have "all"
> in "additional_compile_targets".
> 
> BUG=661774, 725877
> 
> Review-Url: https://codereview.chromium.org/2910603002
> Cr-Commit-Position: refs/heads/master@{#477058}
> Committed:
https://chromium.googlesource.com/chromium/src/+/00f2b7ed28e3d1d864943497d6aa...

TBR=dpranke@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=661774, 725877

Review-Url: https://codereview.chromium.org/2940383002
Cr-Commit-Position: refs/heads/master@{#480218}
Committed:
https://chromium.googlesource.com/chromium/src/+/d8b1ec3835eee2daddcae4c292f9...
==========

[commit-bot: I haz the power, 2017-06-16 23:33:34]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/d8b1ec3835eee2daddcae4c292f9...