Add --hot-reload-test-mode flag to embedder and wire it up to test.py

Add --hot-reload-test-mode flag to embedder and wire it up to test.py

- [x] Add --hot-reload-test-mode to standalone embedder.
- [x] Have test.py pass `--hot-reload-test-mode` instead of specific flags.
- [x] Add --reload_every_back_off flag to control exponential backof off reloads.
- [x] Add --check_reloaded flag to ensure that an isolate has reloaded at least once before exiting.

BUG=
R=rmacnak@google.com

Committed: https://github.com/dart-lang/sdk/commit/621ce4e2fd402015fcdd9a46ea4b361f1437ba26

[Cutch, 2016-07-01 19:40:31]

Description was changed from

==========
Add --hot-reload-test-mode flag to embedder

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

to

==========
Add --hot-reload-test-mode flag to embedder and wire it up to test.py

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

[Cutch, 2016-07-01 19:40:31]

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

[Cutch, 2016-07-01 19:41:52]

Description was changed from

==========
Add --hot-reload-test-mode flag to embedder and wire it up to test.py

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

to

==========
Add --hot-reload-test-mode flag to embedder and wire it up to test.py

- [x] Add --hot-reload-test-mode to standalone embedder.
- [x] Have test.py pass `--hot-reload-test-mode` instead of specific flags.
- [x] Add --reload_every_back_off flag to control exponential backof off
reloads.
- [x] Add --check_reloaded flag to ensure that an isolate has reloaded at least
once before exiting.

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

[rmacnak, 2016-07-01 20:53:22]

lgtm

https://codereview.chromium.org/2118923002/diff/1/runtime/vm/isolate.cc
File runtime/vm/isolate.cc (right):

https://codereview.chromium.org/2118923002/diff/1/runtime/vm/isolate.cc#newco...
runtime/vm/isolate.cc:1700: OS::PrintErr("Isolate did not reload before exiting
and "
FATAL("...")

[Cutch, 2016-07-01 21:26:29]

Description was changed from

==========
Add --hot-reload-test-mode flag to embedder and wire it up to test.py

- [x] Add --hot-reload-test-mode to standalone embedder.
- [x] Have test.py pass `--hot-reload-test-mode` instead of specific flags.
- [x] Add --reload_every_back_off flag to control exponential backof off
reloads.
- [x] Add --check_reloaded flag to ensure that an isolate has reloaded at least
once before exiting.

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

to

==========
Add --hot-reload-test-mode flag to embedder and wire it up to test.py

- [x] Add --hot-reload-test-mode to standalone embedder.
- [x] Have test.py pass `--hot-reload-test-mode` instead of specific flags.
- [x] Add --reload_every_back_off flag to control exponential backof off
reloads.
- [x] Add --check_reloaded flag to ensure that an isolate has reloaded at least
once before exiting.

BUG=
R=rmacnak@google.com

Committed:
https://github.com/dart-lang/sdk/commit/621ce4e2fd402015fcdd9a46ea4b361f1437ba26
==========

[Cutch, 2016-07-01 21:26:30]

Committed patchset #3 (id:40001) manually as
621ce4e2fd402015fcdd9a46ea4b361f1437ba26 (presubmit successful).

[Cutch, 2016-07-01 21:26:40]

https://codereview.chromium.org/2118923002/diff/1/runtime/vm/isolate.cc
File runtime/vm/isolate.cc (right):

https://codereview.chromium.org/2118923002/diff/1/runtime/vm/isolate.cc#newco...
runtime/vm/isolate.cc:1700: OS::PrintErr("Isolate did not reload before exiting
and "
On 2016/07/01 20:53:22, rmacnak wrote:
> FATAL("...")

Done.