Fix service isolate shutdown for precompilation.

Fix service isolate shutdown for precompilation.

Release and debug precompilation VMs start the service isolate, but do
not wait for it to startup (it is there to support Observatory and not
for loading). The main isolate can finish and the VM begin to shutdown
before the service isolate runs main. Handle this case.

BUG=http://dartbug.com/26144
R=johnmccutchan@google.com

Committed: https://github.com/dart-lang/sdk/commit/321872ed73a2a350d02e485540f3309a687ce88d

[rmacnak, 2016-04-04 16:20:52]

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

[rmacnak, 2016-04-04 16:21:17]

Description was changed from

==========
Fix service isolate shutdown for precompilation.

Release and debug precompilation VMs start the service isolate, but do
not wait for it to startup (it is there to support Observatory and not
for loading). The main isolate can finish and the VM begin to shutdown
before the service isolate runs main. Handle this case.
==========

to

==========
Fix service isolate shutdown for precompilation.

Release and debug precompilation VMs start the service isolate, but do
not wait for it to startup (it is there to support Observatory and not
for loading). The main isolate can finish and the VM begin to shutdown
before the service isolate runs main. Handle this case.

BUG=http://dartbug.com/26144
==========

[Cutch, 2016-04-04 16:24:22]

lgtm

[rmacnak, 2016-04-04 16:27:51]

Description was changed from

==========
Fix service isolate shutdown for precompilation.

Release and debug precompilation VMs start the service isolate, but do
not wait for it to startup (it is there to support Observatory and not
for loading). The main isolate can finish and the VM begin to shutdown
before the service isolate runs main. Handle this case.

BUG=http://dartbug.com/26144
==========

to

==========
Fix service isolate shutdown for precompilation.

Release and debug precompilation VMs start the service isolate, but do
not wait for it to startup (it is there to support Observatory and not
for loading). The main isolate can finish and the VM begin to shutdown
before the service isolate runs main. Handle this case.

BUG=http://dartbug.com/26144
R=johnmccutchan@google.com

Committed:
https://github.com/dart-lang/sdk/commit/321872ed73a2a350d02e485540f3309a687ce88d
==========

[rmacnak, 2016-04-04 16:27:52]

Committed patchset #1 (id:1) manually as
321872ed73a2a350d02e485540f3309a687ce88d (presubmit successful).