Clean source maps during partition dispose.

Clean source maps during partition dispose.

This might fix the following exception:

Dart analysis server, SDK version 1.14.0-edge.e3457758ed7e2b24263bcbd9831cd764ce9fd110, server version 1.12.0, FATAL error: Failed to perform operation: Instance of 'PerformAnalysisOperation'
The null object does not have a getter 'modificationTime'.

NoSuchMethodError: method not found: 'modificationTime'
Receiver: null
Arguments: []


R=brianwilkerson@google.com
BUG=

Committed: https://github.com/dart-lang/sdk/commit/6f67abeaaa046e18bcb627cde4c37c2da49eff20

[Brian Wilkerson, 2015-12-01 14:50:17]

LGTM

https://codereview.chromium.org/1480393004/diff/1/pkg/analyzer/test/src/conte...
File pkg/analyzer/test/src/context/cache_test.dart (right):

https://codereview.chromium.org/1480393004/diff/1/pkg/analyzer/test/src/conte...
pkg/analyzer/test/src/context/cache_test.dart:978:
expect(partition.pathToSource, isEmpty);
expect(partition.entryMap, isEmpty); ?

[scheglov, 2015-12-01 15:55:31]

Description was changed from

==========
Clean source maps during partition dispose.

This might fix the following exception:

Dart analysis server, SDK version
1.14.0-edge.e3457758ed7e2b24263bcbd9831cd764ce9fd110, server version 1.12.0,
FATAL error: Failed to perform operation: Instance of 'PerformAnalysisOperation'
The null object does not have a getter 'modificationTime'.

NoSuchMethodError: method not found: 'modificationTime'
Receiver: null
Arguments: []


R=brianwilkerson@google.com
BUG=
==========

to

==========
Clean source maps during partition dispose.

This might fix the following exception:

Dart analysis server, SDK version
1.14.0-edge.e3457758ed7e2b24263bcbd9831cd764ce9fd110, server version 1.12.0,
FATAL error: Failed to perform operation: Instance of 'PerformAnalysisOperation'
The null object does not have a getter 'modificationTime'.

NoSuchMethodError: method not found: 'modificationTime'
Receiver: null
Arguments: []


R=brianwilkerson@google.com
BUG=

Committed:
https://github.com/dart-lang/sdk/commit/6f67abeaaa046e18bcb627cde4c37c2da49eff20
==========

[scheglov, 2015-12-01 15:55:32]

Committed patchset #1 (id:1) manually as
6f67abeaaa046e18bcb627cde4c37c2da49eff20 (presubmit successful).