Merge requested for this patch:
https://codereview.chromium.org/1875223002/
(it's going through the CQ now)

I'd like the merge so metrics aren't messed up between milestones.

Removing merge request until we're in canary.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/907439e58214fcdf4759296655ce650ad4f0eb86

commit 907439e58214fcdf4759296655ce650ad4f0eb86
Author: dmurph <dmurph@chromium.org>
Date: Tue Apr 12 18:46:20 2016

[Blob] Better error reporting and histograms.

The UMA for renderer crashes due to invalid blob messages
is rather high. I'm adding better error reporting to figure
out the issue.

BUG= 602443 

Review URL: https://codereview.chromium.org/1875223002

Cr-Commit-Position: refs/heads/master@{#386754}

[modify] https://crrev.com/907439e58214fcdf4759296655ce650ad4f0eb86/content/browser/bad_message.h
[modify] https://crrev.com/907439e58214fcdf4759296655ce650ad4f0eb86/content/browser/blob_storage/blob_dispatcher_host.cc
[modify] https://crrev.com/907439e58214fcdf4759296655ce650ad4f0eb86/tools/metrics/histograms/histograms.xml

I'd like the merge so metrics aren't messed up between milestones.

Your change meets the bar and is auto-approved for M51 (branch: 2704)

Please merge your change by Friday 5:00 PM PST so we can take it for next week release.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/f236d16d5b2484d5f724afed48044d04659f07b3

commit f236d16d5b2484d5f724afed48044d04659f07b3
Author: Daniel Murphy <dmurph@chromium.org>
Date: Thu Apr 14 19:41:28 2016

[Blob] Better error reporting and histograms.

The UMA for renderer crashes due to invalid blob messages
is rather high. I'm adding better error reporting to figure
out the issue.

BUG= 602443 

Review URL: https://codereview.chromium.org/1875223002

Cr-Commit-Position: refs/heads/master@{#386754}
(cherry picked from commit 907439e58214fcdf4759296655ce650ad4f0eb86)

Review URL: https://codereview.chromium.org/1888453005 .

Cr-Commit-Position: refs/branch-heads/2704@{#58}
Cr-Branched-From: 6e53600def8f60d8c632fadc70d7c1939ccea347-refs/heads/master@{#386251}

[modify] https://crrev.com/f236d16d5b2484d5f724afed48044d04659f07b3/content/browser/bad_message.h
[modify] https://crrev.com/f236d16d5b2484d5f724afed48044d04659f07b3/content/browser/blob_storage/blob_dispatcher_host.cc
[modify] https://crrev.com/f236d16d5b2484d5f724afed48044d04659f07b3/tools/metrics/histograms/histograms.xml

Note: it's unclear whether this is an error with the new blob system, or there was already flakiness here that we just weren't detecting due to how we just ignored invalid messages.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/a00379794f50019c7047c83e537803b7ba2b11ea

commit a00379794f50019c7047c83e537803b7ba2b11ea
Author: dmurph <dmurph@chromium.org>
Date: Thu Apr 21 00:22:40 2016

[Blob] Added error reporting metrics to invalid message errors.

This helps us get to the bottom of where the invalid blob refcount
and url calls are. It's unclear whether these are new or if they've
always occurred, as we used to ignore these messages.

R=kinuko@chromium.org, mpearson@chromium.org
BUG= 602443 

Review URL: https://codereview.chromium.org/1893293006

Cr-Commit-Position: refs/heads/master@{#388626}

[modify] https://crrev.com/a00379794f50019c7047c83e537803b7ba2b11ea/content/browser/blob_storage/blob_dispatcher_host.cc
[modify] https://crrev.com/a00379794f50019c7047c83e537803b7ba2b11ea/tools/metrics/histograms/histograms.xml

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/e0440e2b94ca72b49ce5a2bc45f814033b092d1f

commit e0440e2b94ca72b49ce5a2bc45f814033b092d1f
Author: Daniel Murphy <dmurph@chromium.org>
Date: Fri Apr 29 21:23:40 2016

[Blob] Added error reporting metrics to invalid message errors.

This helps us get to the bottom of where the invalid blob refcount
and url calls are. It's unclear whether these are new or if they've
always occurred, as we used to ignore these messages.

R=kinuko@chromium.org, mpearson@chromium.org
BUG= 602443 , 607698 

Review URL: https://codereview.chromium.org/1893293006

Cr-Commit-Position: refs/heads/master@{#388626}
(cherry picked from commit a00379794f50019c7047c83e537803b7ba2b11ea)

Review URL: https://codereview.chromium.org/1940623002 .

Cr-Commit-Position: refs/branch-heads/2704@{#317}
Cr-Branched-From: 6e53600def8f60d8c632fadc70d7c1939ccea347-refs/heads/master@{#386251}

[modify] https://crrev.com/e0440e2b94ca72b49ce5a2bc45f814033b092d1f/content/browser/blob_storage/blob_dispatcher_host.cc
[modify] https://crrev.com/e0440e2b94ca72b49ce5a2bc45f814033b092d1f/tools/metrics/histograms/histograms.xml