Fix a crash in debugger, add flag --stress-test-background-compilation, add asserts.

Fix a crash in debugger, add flag --stress-test-background-compilation, add asserts.

Fix a crash in debugger: in background compilation check if the function is still marked as optimizable; setting breakpoints at runtime can change that.

Add flag --stress-test-background-compilation which re-feeds compiled functions into the compilation queue.

Add various asserts related to background compilation.

BUG=
R=rmacnak@google.com

Committed: https://github.com/dart-lang/sdk/commit/ad6d0bc8a81010786546e167590a9c8872ed1eb1

[srdjan, 2016-04-15 17:43:44]

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

[rmacnak, 2016-04-15 19:10:17]

lgtm

[srdjan, 2016-04-15 19:12:46]

Description was changed from

==========
Fix a crash in debugger, add flag --stress-test-background-compilation, add
asserts.

Fix a crash in debugger: in background compilation check if the function is
still marked as optimizable; setting breakpoints at runtime can change that.

Add flag --stress-test-background-compilation which re-feeds compiled functions
into the compilation queue.

Add various asserts related to background compilation.

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

to

==========
Fix a crash in debugger, add flag --stress-test-background-compilation, add
asserts.

Fix a crash in debugger: in background compilation check if the function is
still marked as optimizable; setting breakpoints at runtime can change that.

Add flag --stress-test-background-compilation which re-feeds compiled functions
into the compilation queue.

Add various asserts related to background compilation.

BUG=
R=rmacnak@google.com

Committed:
https://github.com/dart-lang/sdk/commit/ad6d0bc8a81010786546e167590a9c8872ed1eb1
==========

[srdjan, 2016-04-15 19:12:47]

Committed patchset #1 (id:1) manually as
ad6d0bc8a81010786546e167590a9c8872ed1eb1 (presubmit successful).