Re-enable and adjust skipped VM debugger tests.

Re-enable and adjust skipped VM debugger tests.

They were skipped because of a long-resolved issue. This required changing
the set of reported variables according to the current debugger implementation.

I adjusted the test to check for substring for the expected function names:

Dart_ActivationFrameGetLocation returns Debugger::QualifiedFunctionName nad
and Dart_FunctionName returns Function::UserVisibleName.
Should the two be made consistent instead?

cc/IsolateInterrupt was skipped on x64 for unknown reasons. It seems to pass fine
(tested locally)

R=hausner@google.com

Committed: https://code.google.com/p/dart/source/detail?r=44597

[Florian Schneider, 2015-03-19 15:51:30]

fschneider@google.com changed reviewers:
+ hausner@google.com

[hausner, 2015-03-19 16:22:30]

LGTM.

I wouldn't change the different function name APIs. I certainly would not make
the basic api function Dart_FunctionName() call into the debugger.  I tried to
keep the debugger code separate as much as possible.

[Florian Schneider, 2015-03-20 09:25:53]

Committed patchset #1 (id:1) manually as r44597 (presubmit successful).