Revert of [inspector] avoid cloning of async call chains

Revert of [inspector] avoid cloning of async call chains (patchset #7 id:120001 of https://codereview.chromium.org/2816043006/ )

Reason for revert:
Speculative revert. Seems to block the roll:
https://codereview.chromium.org/2822983004/

Might require changing a browser test first?

Original issue's description:
> [inspector] avoid cloning of async call chains
> 
> - separated V8StackTraceImpl and AsyncStackTrace,
> - V8Debugger owns all AsyncStackTrace and cleanup half of them when limit is reached (first created - first cleaned),
> - V8StackTraceImpl, AsyncStackTrace and async-task-related tables in V8Debugger have weak reference to other async stack traces.
> - async tasks are cleared with related async stacks.
> 
> BUG=v8:6189
> R=dgozman@chromium.org
> 
> Review-Url: https://codereview.chromium.org/2816043006
> Cr-Commit-Position: refs/heads/master@{#44670}
> Committed: https://chromium.googlesource.com/v8/v8/+/1bca73bc832c645138bd3e0306fcaa8bb44dad04

TBR=dgozman@chromium.org,kozyatinskiy@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:6189
Review-Url: https://codereview.chromium.org/2825713002
Cr-Commit-Position: refs/heads/master@{#44678}
Committed: https://chromium.googlesource.com/v8/v8/+/6fac39b33378511b0ba18c86cf08118e62861957

[Michael Achenbach, 2017-04-18 10:17:16]

The CQ bit was checked by machenbach@chromium.org

[Michael Achenbach, 2017-04-18 10:17:16]

Created Revert of [inspector] avoid cloning of async call chains

[commit-bot: I haz the power, 2017-04-18 10:17:23]

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, 2017-04-18 10:17:34]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1492510636190220, "parent_rev":
"4f3d859f318bcfd462c9a8b394b23185775306ae", "commit_rev":
"6fac39b33378511b0ba18c86cf08118e62861957"}

[commit-bot: I haz the power, 2017-04-18 10:17:39]

Description was changed from

==========
Revert of [inspector] avoid cloning of async call chains (patchset #7 id:120001
of https://codereview.chromium.org/2816043006/ )

Reason for revert:
Speculative revert. Seems to block the roll:
https://codereview.chromium.org/2822983004/

Might require changing a browser test first?

Original issue's description:
> [inspector] avoid cloning of async call chains
> 
> - separated V8StackTraceImpl and AsyncStackTrace,
> - V8Debugger owns all AsyncStackTrace and cleanup half of them when limit is
reached (first created - first cleaned),
> - V8StackTraceImpl, AsyncStackTrace and async-task-related tables in
V8Debugger have weak reference to other async stack traces.
> - async tasks are cleared with related async stacks.
> 
> BUG=v8:6189
> R=dgozman@chromium.org
> 
> Review-Url: https://codereview.chromium.org/2816043006
> Cr-Commit-Position: refs/heads/master@{#44670}
> Committed:
https://chromium.googlesource.com/v8/v8/+/1bca73bc832c645138bd3e0306fcaa8bb44...

TBR=dgozman@chromium.org,kozyatinskiy@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:6189
==========

to

==========
Revert of [inspector] avoid cloning of async call chains (patchset #7 id:120001
of https://codereview.chromium.org/2816043006/ )

Reason for revert:
Speculative revert. Seems to block the roll:
https://codereview.chromium.org/2822983004/

Might require changing a browser test first?

Original issue's description:
> [inspector] avoid cloning of async call chains
> 
> - separated V8StackTraceImpl and AsyncStackTrace,
> - V8Debugger owns all AsyncStackTrace and cleanup half of them when limit is
reached (first created - first cleaned),
> - V8StackTraceImpl, AsyncStackTrace and async-task-related tables in
V8Debugger have weak reference to other async stack traces.
> - async tasks are cleared with related async stacks.
> 
> BUG=v8:6189
> R=dgozman@chromium.org
> 
> Review-Url: https://codereview.chromium.org/2816043006
> Cr-Commit-Position: refs/heads/master@{#44670}
> Committed:
https://chromium.googlesource.com/v8/v8/+/1bca73bc832c645138bd3e0306fcaa8bb44...

TBR=dgozman@chromium.org,kozyatinskiy@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:6189

Review-Url: https://codereview.chromium.org/2825713002
Cr-Commit-Position: refs/heads/master@{#44678}
Committed:
https://chromium.googlesource.com/v8/v8/+/6fac39b33378511b0ba18c86cf08118e628...
==========

[commit-bot: I haz the power, 2017-04-18 10:17:40]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/v8/v8/+/6fac39b33378511b0ba18c86cf08118e628...