[tracing] Support BACKGROUND mode in MemoryCache dump provider

[tracing] Support BACKGROUND mode in MemoryCache dump provider

This CL adds support for BACKGROUND mode in MemoryCache dump provider,
where it just adds the total sizes of resources (given by encodedSize
of each resource).
This CL also fixes the image resources reporting which had a shared
buffer that was not reported in the ImageResource subclass.
It also fixes the SharedBuffer::onMemoryDump to dump when both shared
buffer and segments are used together.

BUG=629925
Committed: https://crrev.com/203b334b85d015fb651010ba89e6c6f31bae2b2e
Cr-Commit-Position: refs/heads/master@{#418957}

[ssid, 2016-09-12 22:09:35]

ssid@chromium.org changed reviewers:
+ haraken@chromium.org

[ssid, 2016-09-12 22:09:35]

+Kentaro ptal, thanks.

[haraken, 2016-09-13 01:23:10]

LGTM

[ssid, 2016-09-13 01:24:22]

ssid@chromium.org changed reviewers:
+ primiano@chromium.org

[ssid, 2016-09-13 01:24:22]

+primiano added few values in background_whitelist. ptal, thanks.

[hajimehoshi, 2016-09-13 03:53:24]

lgtm

[ssid, 2016-09-15 18:36:38]

The CQ bit was checked by ssid@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2016-09-15 18:37:05]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-09-15 20:33:07]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2016-09-15 20:33:08]

Dry run: This issue passed the CQ dry run.

[ssid, 2016-09-15 20:34:08]

The CQ bit was checked by ssid@chromium.org

[ssid, 2016-09-15 20:34:09]

The patchset sent to the CQ was uploaded after l-g-t-m from
haraken@chromium.org, hajimehoshi@chromium.org
Link to the patchset: https://codereview.chromium.org/2337733002/#ps20001
(title: "remove trace_event change.")

[commit-bot: I haz the power, 2016-09-15 20:34:41]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-09-15 20:40:48]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2016-09-15 20:42:31]

Description was changed from

==========
[tracing] Support BACKGROUND mode in MemoryCache dump provider

This CL adds support for BACKGROUND mode in MemoryCache dump provider,
where it just adds the total sizes of resources (given by encodedSize
of each resource).
This CL also fixes the image resources reporting which had a shared
buffer that was not reported in the ImageResource subclass.
It also fixes the SharedBuffer::onMemoryDump to dump when both shared
buffer and segments are used together.

BUG=629925
==========

to

==========
[tracing] Support BACKGROUND mode in MemoryCache dump provider

This CL adds support for BACKGROUND mode in MemoryCache dump provider,
where it just adds the total sizes of resources (given by encodedSize
of each resource).
This CL also fixes the image resources reporting which had a shared
buffer that was not reported in the ImageResource subclass.
It also fixes the SharedBuffer::onMemoryDump to dump when both shared
buffer and segments are used together.

BUG=629925

Committed: https://crrev.com/203b334b85d015fb651010ba89e6c6f31bae2b2e
Cr-Commit-Position: refs/heads/master@{#418957}
==========

[commit-bot: I haz the power, 2016-09-15 20:42:32]

Patchset 2 (id:??) landed as
https://crrev.com/203b334b85d015fb651010ba89e6c6f31bae2b2e
Cr-Commit-Position: refs/heads/master@{#418957}

[Primiano Tucci (use gerrit), 2016-10-11 13:05:31]

On 2016/09/15 20:42:32, commit-bot: I haz the power wrote:
> Patchset 2 (id:??) landed as
> https://crrev.com/203b334b85d015fb651010ba89e6c6f31bae2b2e
> Cr-Commit-Position: refs/heads/master@{#418957}

I think this is causing some funky accounting issues in webcache. see
crbug.com/654715