Remove HeapProfiler.finishHeapSnapshot event from remote debugging protocol

Remove HeapProfiler.finishHeapSnapshot event from remote debugging protocol

This event is redundant as it is sent right before the response to HeapProfiler.getHeapSnapshot command. The command response should be used instead of the event.

BUG=306475
R=loislo@chromium.org

Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=159652

[yurys, 2013-10-11 11:30:58]

There is a few usages of this event in the telemetry code which should be
updated before landing this CL.

[loislo, 2013-10-11 11:45:13]

lgtm

[commit-bot: I haz the power, 2013-10-15 07:35:43]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/yurys@chromium.org/27000005/1

[commit-bot: I haz the power, 2013-10-15 08:22:38]

Retried try job too often on linux_blink_rel for step(s) webkit_tests
http://build.chromium.org/p/tryserver.chromium/buildstatus?builder=linux_blin...

[yurys, 2013-10-15 09:00:26]

Committed patchset #2 manually as r159652 (presubmit successful).