dart:developer service extension fixes

dart:developer service extension fixes

Fixes #25724
Fixes Florian Loitsch's emailed request (get rid of k prefix on constants).

- Rename ServiceExtensionResponse constants to not have a 'k' prefix.
- Provide more explanation on how to invoke service extensions (they require an 'isolateId' parameter).
- Require extension method names to begin with "ext." and recommend the template: "ext.package.command" to avoid conflicts with other packages.

R=rmacnak@google.com

Committed: https://github.com/dart-lang/sdk/commit/b9b0649b9cfe11c8dc62edfd5606c4790c793d3a

[Cutch, 2016-02-09 02:14:22]

Description was changed from

==========
dart:developer service extension fixes

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

to

==========
dart:developer service extension fixes

Fixes #25724
Fixes Florian Loitsch's emailed request (get rid of k prefix on constants).

- Rename ServiceExtensionResponse constants to not have a 'k' prefix.
- Provide more explanation on how to invoke service extensions (they require an
'isolateId' parameter).
- Require extension method names to begin with "ext_" and recommend the
template: "ext_package_command" to avoid conflicts with other packages.
==========

[Cutch, 2016-02-09 02:14:22]

johnmccutchan@google.com changed reviewers:
+ rmacnak@google.com

[rmacnak, 2016-02-09 18:32:21]

lgtm

[Cutch, 2016-02-09 20:30:47]

Description was changed from

==========
dart:developer service extension fixes

Fixes #25724
Fixes Florian Loitsch's emailed request (get rid of k prefix on constants).

- Rename ServiceExtensionResponse constants to not have a 'k' prefix.
- Provide more explanation on how to invoke service extensions (they require an
'isolateId' parameter).
- Require extension method names to begin with "ext_" and recommend the
template: "ext_package_command" to avoid conflicts with other packages.
==========

to

==========
dart:developer service extension fixes

Fixes #25724
Fixes Florian Loitsch's emailed request (get rid of k prefix on constants).

- Rename ServiceExtensionResponse constants to not have a 'k' prefix.
- Provide more explanation on how to invoke service extensions (they require an
'isolateId' parameter).
- Require extension method names to begin with "ext." and recommend the
template: "ext.package.command" to avoid conflicts with other packages.
==========

[Cutch, 2016-02-10 16:54:55]

Description was changed from

==========
dart:developer service extension fixes

Fixes #25724
Fixes Florian Loitsch's emailed request (get rid of k prefix on constants).

- Rename ServiceExtensionResponse constants to not have a 'k' prefix.
- Provide more explanation on how to invoke service extensions (they require an
'isolateId' parameter).
- Require extension method names to begin with "ext." and recommend the
template: "ext.package.command" to avoid conflicts with other packages.
==========

to

==========
dart:developer service extension fixes

Fixes #25724
Fixes Florian Loitsch's emailed request (get rid of k prefix on constants).

- Rename ServiceExtensionResponse constants to not have a 'k' prefix.
- Provide more explanation on how to invoke service extensions (they require an
'isolateId' parameter).
- Require extension method names to begin with "ext." and recommend the
template: "ext.package.command" to avoid conflicts with other packages.

R=rmacnak@google.com

Committed:
https://github.com/dart-lang/sdk/commit/b9b0649b9cfe11c8dc62edfd5606c4790c793d3a
==========

[Cutch, 2016-02-10 16:54:56]

Committed patchset #4 (id:60001) manually as
b9b0649b9cfe11c8dc62edfd5606c4790c793d3a (presubmit successful).