Revert of Added GetCpuTime to base/ to get total CPU time consumed by process for perf tests.

Revert of Added GetCpuTime to base/ to get total CPU time consumed by process for perf tests. (patchset #24 id:440001 of https://codereview.webrtc.org/2695743003/ )

Reason for revert:
The GetThreadCpuTimeTest.SingleThread and .TwoThreads tests are unfortunately flaky on Mac (maybe other platforms).  See for example:

https://build.chromium.org/p/client.webrtc/builders/Mac%20Asan/builds/11271/steps/rtc_unittests%20on%20Mac-10.11/logs/stdio

https://build.chromium.org/p/client.webrtc/builders/Mac64%20Debug/builds/10395/steps/rtc_unittests%20on%20Mac-10.11/logs/stdio

https://build.chromium.org/p/client.webrtc/builders/Mac%20Asan/builds/11271/steps/rtc_unittests%20on%20Mac-10.11/logs/stdio

Since it's late, I'll have to revert the CL to get the tree and trybots green (instead of only disabling the failing tests).

Original issue's description:
> Added GetCpuTime to base/ to get total CPU time consumed by process for perf tests.
> 
> BUG=webrtc:7095
> 
> Review-Url: https://codereview.webrtc.org/2695743003
> Cr-Commit-Position: refs/heads/master@{#16665}
> Committed: https://chromium.googlesource.com/external/webrtc/+/3ff474b72ba1b34027e8391b1014c2838af445d4

TBR=sprang@webrtc.org,mflodman@webrtc.org,deadbeef@webrtc.org,nisse@webrtc.org,kjellander@webrtc.org,ilnik@webrtc.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=webrtc:7095
Review-Url: https://codereview.webrtc.org/2698333004
Cr-Commit-Position: refs/heads/master@{#16679}
Committed: https://chromium.googlesource.com/external/webrtc/+/658c3bb0aba00142284bd464d1e2d693e53f931e

[tommi, 2017-02-17 22:59:05]

The CQ bit was checked by tommi@webrtc.org

[tommi, 2017-02-17 22:59:06]

Created Revert of Added GetCpuTime to base/ to get total CPU time consumed by
process for perf tests.

[commit-bot: I haz the power, 2017-02-17 22:59:14]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.webrtc.org/...

[commit-bot: I haz the power, 2017-02-17 22:59:19]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1487372345620700, "parent_rev":
"cc8588c0400df7c03f305da0a96c32bae3b5b2fa", "commit_rev":
"658c3bb0aba00142284bd464d1e2d693e53f931e"}

[commit-bot: I haz the power, 2017-02-17 22:59:23]

Description was changed from

==========
Revert of Added GetCpuTime to base/ to get total CPU time consumed by process
for perf tests. (patchset #24 id:440001 of
https://codereview.webrtc.org/2695743003/ )

Reason for revert:
The GetThreadCpuTimeTest.SingleThread and .TwoThreads tests are unfortunately
flaky on Mac (maybe other platforms).  See for example:

https://build.chromium.org/p/client.webrtc/builders/Mac%20Asan/builds/11271/s...

https://build.chromium.org/p/client.webrtc/builders/Mac64%20Debug/builds/1039...

https://build.chromium.org/p/client.webrtc/builders/Mac%20Asan/builds/11271/s...

Since it's late, I'll have to revert the CL to get the tree and trybots green
(instead of only disabling the failing tests).

Original issue's description:
> Added GetCpuTime to base/ to get total CPU time consumed by process for perf
tests.
> 
> BUG=webrtc:7095
> 
> Review-Url: https://codereview.webrtc.org/2695743003
> Cr-Commit-Position: refs/heads/master@{#16665}
> Committed:
https://chromium.googlesource.com/external/webrtc/+/3ff474b72ba1b34027e8391b1...

TBR=sprang@webrtc.org,mflodman@webrtc.org,deadbeef@webrtc.org,nisse@webrtc.or...
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=webrtc:7095
==========

to

==========
Revert of Added GetCpuTime to base/ to get total CPU time consumed by process
for perf tests. (patchset #24 id:440001 of
https://codereview.webrtc.org/2695743003/ )

Reason for revert:
The GetThreadCpuTimeTest.SingleThread and .TwoThreads tests are unfortunately
flaky on Mac (maybe other platforms).  See for example:

https://build.chromium.org/p/client.webrtc/builders/Mac%20Asan/builds/11271/s...

https://build.chromium.org/p/client.webrtc/builders/Mac64%20Debug/builds/1039...

https://build.chromium.org/p/client.webrtc/builders/Mac%20Asan/builds/11271/s...

Since it's late, I'll have to revert the CL to get the tree and trybots green
(instead of only disabling the failing tests).

Original issue's description:
> Added GetCpuTime to base/ to get total CPU time consumed by process for perf
tests.
> 
> BUG=webrtc:7095
> 
> Review-Url: https://codereview.webrtc.org/2695743003
> Cr-Commit-Position: refs/heads/master@{#16665}
> Committed:
https://chromium.googlesource.com/external/webrtc/+/3ff474b72ba1b34027e8391b1...

TBR=sprang@webrtc.org,mflodman@webrtc.org,deadbeef@webrtc.org,nisse@webrtc.or...
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=webrtc:7095

Review-Url: https://codereview.webrtc.org/2698333004
Cr-Commit-Position: refs/heads/master@{#16679}
Committed:
https://chromium.googlesource.com/external/webrtc/+/658c3bb0aba00142284bd464d...
==========

[commit-bot: I haz the power, 2017-02-17 22:59:24]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/external/webrtc/+/658c3bb0aba00142284bd464d...