Mozart: Add ViewInspector contracts for hit testing.

Mozart: Add ViewInspector contracts for hit testing.

Allow ViewAssociates to perform hit testing on the rendered scene
graph and to map scene tokens to view tokens as required.

Rather than force an extra round-trip through the ViewManager for
each hit test, this contract is designed to allow the client to
cache the scene token to view token mapping locally.

BUG=
R=abarth@google.com

Committed: https://chromium.googlesource.com/external/mojo/+/59cd2e422c963c6f1f577893e294a7a8902eb5b9

[jeffbrown, 2016-03-09 02:24:16]

jeffbrown@google.com changed reviewers:
+ abarth@google.com

[abarth, 2016-03-09 04:19:16]

lgtm

[jeffbrown, 2016-03-09 22:23:13]

Description was changed from

==========
Mozart: Add ViewInspector contracts for hit testing.

Allow ViewAssociates to perform hit testing on the rendered scene
graph and to map scene tokens to view tokens as required.

Rather than force an extra round-trip through the ViewManager for
each hit test, this contract is designed to allow the client to
cache the scene token to view token mapping locally.

BUG=
==========

to

==========
Mozart: Add ViewInspector contracts for hit testing.

Allow ViewAssociates to perform hit testing on the rendered scene
graph and to map scene tokens to view tokens as required.

Rather than force an extra round-trip through the ViewManager for
each hit test, this contract is designed to allow the client to
cache the scene token to view token mapping locally.

BUG=
R=abarth@google.com

Committed:
https://chromium.googlesource.com/external/mojo/+/59cd2e422c963c6f1f577893e29...
==========

[jeffbrown, 2016-03-09 22:23:15]

Committed patchset #2 (id:20001) manually as
59cd2e422c963c6f1f577893e294a7a8902eb5b9 (presubmit successful).