The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/c7ca97d0c3786d65e81f25788ffcadbc302a8756

commit c7ca97d0c3786d65e81f25788ffcadbc302a8756
Author: Alexei Filippov <alph@chromium.org>
Date: Wed May 30 21:38:38 2018

DevTools: Fix CPU profile frames being offset by 1 sample.

In CPU profile samples delta for the first sample is an offset from
startTime.

BUG= 847887 

Change-Id: I200eae40770b521545c831f0e6e1ffa311cb7a85
Reviewed-on: https://chromium-review.googlesource.com/1079432
Reviewed-by: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Commit-Queue: Alexei Filippov <alph@chromium.org>
Cr-Commit-Position: refs/heads/master@{#563006}
[modify] https://crrev.com/c7ca97d0c3786d65e81f25788ffcadbc302a8756/third_party/WebKit/LayoutTests/http/tests/devtools/profiler/cpu-profiler-fix-missing-samples-expected.txt
[modify] https://crrev.com/c7ca97d0c3786d65e81f25788ffcadbc302a8756/third_party/WebKit/LayoutTests/http/tests/devtools/profiler/cpu-profiler-parsing-expected.txt
[modify] https://crrev.com/c7ca97d0c3786d65e81f25788ffcadbc302a8756/third_party/WebKit/LayoutTests/http/tests/devtools/tracing/timeline-js/timeline-js-streamed-cpu-profile-expected.txt
[modify] https://crrev.com/c7ca97d0c3786d65e81f25788ffcadbc302a8756/third_party/WebKit/LayoutTests/http/tests/devtools/tracing/trace-event-self-time-expected.txt
[modify] https://crrev.com/c7ca97d0c3786d65e81f25788ffcadbc302a8756/third_party/blink/renderer/devtools/front_end/sdk/CPUProfileDataModel.js

Your change meets the bar and is auto-approved for M68. Please go ahead and merge the CL to branch 3440 manually. Please contact milestone owner if you have questions.
Owners: cmasso@(Android), kariahda@(iOS), bhthompson@(ChromeOS), abdulsyed@(Desktop)

For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot

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This issue has been approved for a merge. Please merge the fix to any appropriate branches as soon as possible!

If all merges have been completed, please remove any remaining Merge-Approved labels from this issue.

Thanks for your time! To disable nags, add the Disable-Nags label.

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The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/0e9c12733a9ac7077cdf60676e7c3035411021b3

commit 0e9c12733a9ac7077cdf60676e7c3035411021b3
Author: Alexei Filippov <alph@chromium.org>
Date: Fri Jun 08 18:14:15 2018

DevTools: Fix CPU profile frames being offset by 1 sample.

In CPU profile samples delta for the first sample is an offset from
startTime.

BUG= 847887 
TBR=alph@chromium.org

(cherry picked from commit c7ca97d0c3786d65e81f25788ffcadbc302a8756)

Change-Id: I200eae40770b521545c831f0e6e1ffa311cb7a85
Reviewed-on: https://chromium-review.googlesource.com/1079432
Reviewed-by: Aleksey Kozyatinskiy <kozyatinskiy@chromium.org>
Commit-Queue: Alexei Filippov <alph@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#563006}
Reviewed-on: https://chromium-review.googlesource.com/1093427
Reviewed-by: Alexei Filippov <alph@chromium.org>
Cr-Commit-Position: refs/branch-heads/3440@{#262}
Cr-Branched-From: 010ddcfda246975d194964ccf20038ebbdec6084-refs/heads/master@{#561733}
[modify] https://crrev.com/0e9c12733a9ac7077cdf60676e7c3035411021b3/third_party/WebKit/LayoutTests/http/tests/devtools/profiler/cpu-profiler-fix-missing-samples-expected.txt
[modify] https://crrev.com/0e9c12733a9ac7077cdf60676e7c3035411021b3/third_party/WebKit/LayoutTests/http/tests/devtools/profiler/cpu-profiler-parsing-expected.txt
[modify] https://crrev.com/0e9c12733a9ac7077cdf60676e7c3035411021b3/third_party/WebKit/LayoutTests/http/tests/devtools/tracing/timeline-js/timeline-js-streamed-cpu-profile-expected.txt
[modify] https://crrev.com/0e9c12733a9ac7077cdf60676e7c3035411021b3/third_party/WebKit/LayoutTests/http/tests/devtools/tracing/trace-event-self-time-expected.txt
[modify] https://crrev.com/0e9c12733a9ac7077cdf60676e7c3035411021b3/third_party/blink/renderer/devtools/front_end/sdk/CPUProfileDataModel.js