Revert "Validate histograms before and after each task on Android."

This reverts commit 7662ff8cb53121cd4d8916007d430b36efd45895.

Reason for revert: Original change made it to Android canary, reverting per plan now that we have data.

Original change's description:
> Validate histograms before and after each task on Android.
> 
> This is a temporary CL for Android to find the source of a core
> trampler that is overwriting various heap objects.  It is expected
> that this will have a significant performance impact to tasks
> (guess 1-to-10ms per task) so the intention is to produce one Canary
> build and then revert it while the resulting data is examined.
> 
> Bug: 744734
> Change-Id: Icf556e61c358982fb3f09ef7318d6c4443554e5a
> Reviewed-on: https://chromium-review.googlesource.com/619272
> Reviewed-by: Bo <boliu@chromium.org>
> Reviewed-by: Scott Violet <sky@chromium.org>
> Reviewed-by: Alok Priyadarshi <alokp@chromium.org>
> Reviewed-by: Mark Mentovai <mark@chromium.org>
> Reviewed-by: Alexei Svitkine (very slow) <asvitkine@chromium.org>
> Commit-Queue: Brian White <bcwhite@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#496878}

TBR=sky@chromium.org,boliu@chromium.org,asvitkine@chromium.org,amineer@chromium.org,bcwhite@chromium.org,mark@chromium.org,alokp@chromium.org

# Not skipping CQ checks because original CL landed > 1 day ago.

Bug: 744734
Change-Id: Id7676dc2a3050ddc101ff69bb5f2cf6039d258f7
Reviewed-on: https://chromium-review.googlesource.com/636165
Reviewed-by: Alexei Svitkine (very slow) <asvitkine@chromium.org>
Reviewed-by: Alok Priyadarshi <alokp@chromium.org>
Reviewed-by: Scott Violet <sky@chromium.org>
Commit-Queue: Alexei Svitkine (very slow) <asvitkine@chromium.org>
Cr-Commit-Position: refs/heads/master@{#497594}

CrOS-Libchrome-Original-Commit: 43aa08eb002ccb00174fefd9be693498a0d58a5c
4 files changed
tree: a83581d902a2fdf98aa748b902806d2fc31b0e7c
  1. base/
  2. build/
  3. components/
  4. dbus/
  5. device/
  6. ipc/
  7. mojo/
  8. testing/
  9. third_party/
  10. ui/