Propagate attributes from global to process memory allocator dumps

Propagate attributes from global to process memory allocator dumps

This patch modifies the Memory infrastructure to copy attributes from
MemoryAllocatorDump(s) in the global space to their owner
MemoryAllocatorDump(s) in individual processes.

Rationale: Chrome's browser process is able to get the resident memory
of each segment of discardable memory from the system. The renderer
processes cannot do this (even though they actually use the segments)
because of the sandbox. By propagating attributes from the global memory
allocator dumps (created by the browser) to the process memory allocator
dumps (created by the renderers), we make this information available
in the memory allocator dumps from the renderer.

BUG=#1461

Committed: https://chromium.googlesource.com/external/github.com/catapult-project/catapult/+/2aefd8d3797189dc00b97d254f21e3b74a481b1c

[petrcermak, 2015-10-07 17:28:35]

Patchset #1 (id:1) has been deleted

[petrcermak, 2015-10-07 17:29:12]

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

[petrcermak, 2015-10-07 17:29:12]

Hi,

Please review this patch.

Thanks,
Petr

[Primiano Tucci (use gerrit), 2015-10-07 17:34:53]

Awesome thanks LGTM
I'd probably expand a bit the commit message with a simple example (you can
explicitly mention the discardable example)
so by looking at the git logs we can figure out what this CL was for

[petrcermak, 2015-10-07 17:43:27]

Thanks for your comments. Somehow I knew you'd ask for that.

Petr

[petrcermak, 2015-10-07 17:43:38]

The CQ bit was checked by petrcermak@chromium.org

[commit-bot: I haz the power, 2015-10-07 17:44:28]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1395583002/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1395583002/20001

[commit-bot: I haz the power, 2015-10-07 17:51:09]

Committed patchset #1 (id:20001) as
https://chromium.googlesource.com/external/github.com/catapult-project/catapu...