Add a convenience method to get the debugged context

Add a convenience method to get the debugged context

Since the generic GetCallingContext is deprecated, but there's still the
use case for the debugger to get the currently debugged context while in
the debug context, add a convenience API for it.

Note that EventDetails already exposes this context, but the embedder
might not necessarily have the EventDetails around.

R=verwaest@chromium.org
BUG=

Committed: https://crrev.com/37394eb3b0b7d38bccedef268aed4bb307db6ce7
Cr-Commit-Position: refs/heads/master@{#36751}

[Toon Verwaest, 2016-06-06 13:54:59]

lgtm

[jochen (gone - plz use gerrit), 2016-06-06 13:55:16]

The CQ bit was checked by jochen@chromium.org

[commit-bot: I haz the power, 2016-06-06 13:55:27]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/2040853003/1

[commit-bot: I haz the power, 2016-06-06 14:11:36]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-06-06 14:12:19]

Description was changed from

==========
Add a convenience method to get the debugged context

Since the generic GetCallingContext is deprecated, but there's still the
use case for the debugger to get the currently debugged context while in
the debug context, add a convenience API for it.

Note that EventDetails already exposes this context, but the embedder
might not necessarily have the EventDetails around.

R=verwaest@chromium.org
BUG=
==========

to

==========
Add a convenience method to get the debugged context

Since the generic GetCallingContext is deprecated, but there's still the
use case for the debugger to get the currently debugged context while in
the debug context, add a convenience API for it.

Note that EventDetails already exposes this context, but the embedder
might not necessarily have the EventDetails around.

R=verwaest@chromium.org
BUG=

Committed: https://crrev.com/37394eb3b0b7d38bccedef268aed4bb307db6ce7
Cr-Commit-Position: refs/heads/master@{#36751}
==========

[commit-bot: I haz the power, 2016-06-06 14:12:20]

Patchset 1 (id:??) landed as
https://crrev.com/37394eb3b0b7d38bccedef268aed4bb307db6ce7
Cr-Commit-Position: refs/heads/master@{#36751}