Reland of DevTools: fix mixed arguments in Tracing.bufferUsage event (patchset #1 id:1 of https://codereview.chromium.org/2776043002/ )

Reason for revert:
Re-land, see comments in https://codereview.chromium.org/2752083002 for details.
BUG=705306

Original issue's description:
> Revert of DevTools: fix mixed arguments in Tracing.bufferUsage event (patchset #1 id:1 of https://codereview.chromium.org/2752083002/ )
>
> Reason for revert:
> Speculative, looks like this broke a bunch of devtool tests on msan, first failure at https://build.chromium.org/p/chromium.memory.full/builders/Linux%20MSan%20Tests/builds/6404 but still broken 80 builds later.
>
> Original issue's description:
> > DevTools: fix mixed arguments in Tracing.bufferUsage event
> >
> > Originally regressed by https://codereview.chromium.org/2500093002
> >
> > BUG=b/36176396
> >
> > Review-Url: https://codereview.chromium.org/2752083002
> > Cr-Commit-Position: refs/heads/master@{#457227}
> > Committed: https://chromium.googlesource.com/chromium/src/+/c8dc5d159a4716659d8698b093794f7c9eaa24ed
>
> TBR=dgozman@chromium.org,caseq@chromium.org
> # Not skipping CQ checks because original CL landed more than 1 days ago.
> BUG=b/36176396
>
> Review-Url: https://codereview.chromium.org/2776043002
> Cr-Commit-Position: refs/heads/master@{#459668}
> Committed: https://chromium.googlesource.com/chromium/src/+/e14291f0adaf71cd42ef1c1a9d70ace4e309a1ba

TBR=dgozman@chromium.org,thakis@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=b/36176396

Review-Url: https://codereview.chromium.org/2763413011
Cr-Commit-Position: refs/heads/master@{#459681}
1 file changed