Sundry service protocol cleanups before version 1.0.

Sundry service protocol cleanups before version 1.0.

Frame.depth -> Frame.index
Message.depth -> Message.index
Remove Message.type
Message.priority becomes private
frame -> frameIndex for evaluateInFrame
Class.finalized, Class.implemented, Class.patch Class.allocationStats become private
Instance.nativeFields becomes private
Field.value moves out of "ref" into full object
Field.value -> Field.staticValue
Move Function.static, Function.const to "ref"
Make Script.kind private in docs
Make Function.kind private

BUG=
R=rmacnak@google.com

Committed: https://github.com/dart-lang/sdk/commit/563083696cb9ff3ff1faa0615832f146c7a651c9

[turnidge, 2015-05-27 20:28:51]

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

[rmacnak, 2015-05-27 20:49:43]

LGTM

[turnidge, 2015-05-28 16:31:00]

Committed patchset #2 (id:20001) manually as
563083696cb9ff3ff1faa0615832f146c7a651c9 (presubmit successful).