Add SameVersionStartupCounts suffix to multiple startup histograms.

With this CL, the following histograms are recorded with a suffix
indicating the number of startups with the same version:
- Startup.BrowserMainToRendererMain
- Startup.BrowserMessageLoopStartTime
- Startup.BrowserMessageLoopStartTimeFromMainEntry
- Startup.BrowserOpenTabs
- Startup.BrowserWindowDisplay
- Startup.FirstWebContents.MainFrameLoad2
- Startup.FirstWebContents.MainNavigationFinished
- Startup.FirstWebContents.MainNavigationStart
- Startup.FirstWebContents.NonEmptyPaint2
- Startup.LoadTime.ExeMainToDllMain
- Startup.LoadTime.ProcessCreateToDllMain
- Startup.LoadTime.ProcessCreateToExeMain
- Startup.SystemUptime
- Startup.TimeSinceLastStartup

BUG=580211

Review-Url: https://codereview.chromium.org/2117373003
Cr-Original-Commit-Position: refs/heads/master@{#406046}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: f1cf57529db3bc83795ae34db80c8c1742420aeb
1 file changed
tree: ec215e6731f5a7c6d9d9fa60df3944c5d024de18
  1. trace_event_common.h