Add DirectoryBasedDartSdk.useSummary property.

Add DirectoryBasedDartSdk.useSummary property.

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

Committed: https://github.com/dart-lang/sdk/commit/abc69cb2322e65d90883cd7f765e68af244d6dc8

[Paul Berry, 2016-02-09 20:36:09]

lgtm

https://codereview.chromium.org/1687583002/diff/1/pkg/analyzer/lib/src/genera...
File pkg/analyzer/lib/src/generated/sdk_io.dart (right):

https://codereview.chromium.org/1687583002/diff/1/pkg/analyzer/lib/src/genera...
pkg/analyzer/lib/src/generated/sdk_io.dart:401: * before [context] was invoked.
s/was/is/

[Brian Wilkerson, 2016-02-09 20:41:07]

https://codereview.chromium.org/1687583002/diff/1/pkg/analyzer/lib/src/genera...
File pkg/analyzer/lib/src/generated/sdk_io.dart (right):

https://codereview.chromium.org/1687583002/diff/1/pkg/analyzer/lib/src/genera...
pkg/analyzer/lib/src/generated/sdk_io.dart:212: bool _useSummary = false;
I don't understand what the value of this flag is or where this code is going
long term. Currently this field is initialized to `false` and explicitly set to
`false` in one place, so it can never be `true`. Will the default change? Will
other clients set it to `true`?

[scheglov, 2016-02-09 20:49:33]

Description was changed from

==========
Add DirectoryBasedDartSdk.useSummary property.

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

to

==========
Add DirectoryBasedDartSdk.useSummary property.

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

Committed:
https://github.com/dart-lang/sdk/commit/abc69cb2322e65d90883cd7f765e68af244d6dc8
==========

[scheglov, 2016-02-09 20:49:34]

Committed patchset #1 (id:1) manually as
abc69cb2322e65d90883cd7f765e68af244d6dc8 (presubmit successful).