Add Tracing.requestMemoryDump method to DevTools API (tracing handler)

Add Tracing.requestMemoryDump method to DevTools API (tracing handler)

This method will allow profiling memory tools such as Telemetry to
request memory dumps.

Proposal:
https://docs.google.com/document/d/190-URzSjfsiXNeyke86z85-5ctuqsC_RoX1J1uJTwIQ/edit?usp=sharing

Protocol change (Blink side):
https://codereview.chromium.org/1235393005/

BUG=505826
Committed: https://crrev.com/e5e034c10e80e5c1338cea0b17ea8cf0516d9908
Cr-Commit-Position: refs/heads/master@{#340680}

[petrcermak, 2015-07-17 12:52:26]

Patchset #1 (id:1) has been deleted

[petrcermak, 2015-07-24 14:37:12]

On 2015/07/17 12:52:26, petrcermak wrote:
> Patchset #1 (id:1) has been deleted

This patch was superseded by https://codereview.chromium.org/1245233004/. We
decided to extend the API exposed by the existing memory benchmarking extension
instead of augmenting the DevTools API.

[pfeldman, 2015-07-24 20:55:46]

pfeldman@chromium.org changed reviewers:
+ pfeldman@chromium.org

[pfeldman, 2015-07-24 20:55:46]

lgtm

[pfeldman, 2015-07-24 20:56:23]

lgtm, you'll need to follow up with the protocol.json change.

[petrcermak, 2015-07-27 10:31:43]

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

[petrcermak, 2015-07-27 10:31:43]

dsinclair: Could I please get a stamp from you? Primiano is OOO for 2 weeks.

Thanks,
Petr

[petrcermak, 2015-07-27 14:47:57]

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

[petrcermak, 2015-07-27 14:47:58]

nduca: Could I please get a stamp from you for base/trace_event? Both primiano
and dsinclair are OOO.

Thanks,
Petr

[Primiano Tucci (use gerrit), 2015-07-27 17:03:25]

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

[Primiano Tucci (use gerrit), 2015-07-27 17:03:25]

OOO LGTM

[petrcermak, 2015-07-27 17:04:14]

The CQ bit was checked by petrcermak@chromium.org

[commit-bot: I haz the power, 2015-07-27 17:04:58]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1232313004/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1232313004/20001

[commit-bot: I haz the power, 2015-07-27 17:13:28]

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

[commit-bot: I haz the power, 2015-07-27 17:13:29]

Try jobs failed on following builders:
  cast_shell_linux on tryserver.chromium.linux (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.linux/builders/cast_shell_linu...)

[petrcermak, 2015-07-28 13:16:41]

The CQ bit was checked by petrcermak@chromium.org

[petrcermak, 2015-07-28 13:16:41]

The patchset sent to the CQ was uploaded after l-g-t-m from
primiano@chromium.org, pfeldman@chromium.org
Link to the patchset: https://codereview.chromium.org/1232313004/#ps40001
(title: "Rebase after stubs landed")

[commit-bot: I haz the power, 2015-07-28 13:16:48]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1232313004/40001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1232313004/40001

[commit-bot: I haz the power, 2015-07-28 14:22:05]

Committed patchset #2 (id:40001)

[commit-bot: I haz the power, 2015-07-28 14:22:37]

Patchset 2 (id:??) landed as
https://crrev.com/e5e034c10e80e5c1338cea0b17ea8cf0516d9908
Cr-Commit-Position: refs/heads/master@{#340680}