Fix package URI calculation when in third_party but not third_party/dart

Fix package URI calculation when in third_party but not third_party/dart

In this case we should use a dotted package name, similar to other
packages outside third_party.

Previously, restoreAbsolute() didn't return a package URI at all,
which would result in a relative path being suggested for a
missing import.

BUG=
R=brianwilkerson@google.com

Committed: https://github.com/dart-lang/sdk/commit/ef48584f1f3469c8abb51ea4f4fe3da3e886ff26

[skybrian, 2017-03-24 22:57:46]

Description was changed from

==========
Fix package URI calculation when in third_party but not third_party/dart

In this case we should use a dotted package name, similar to other
packages outside third_party.

Previously, restoreAbsolute() didn't return a package URI at all,
which would result in a relative path being suggested for a
missing import.

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

to

==========
Fix package URI calculation when in third_party but not third_party/dart

In this case we should use a dotted package name, similar to other
packages outside third_party.

Previously, restoreAbsolute() didn't return a package URI at all,
which would result in a relative path being suggested for a
missing import.

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

[skybrian, 2017-03-24 22:57:46]

skybrian@google.com changed reviewers:
+ brianwilkerson@google.com

[Brian Wilkerson, 2017-03-24 23:47:16]

lgtm

[skybrian, 2017-03-24 23:59:49]

Description was changed from

==========
Fix package URI calculation when in third_party but not third_party/dart

In this case we should use a dotted package name, similar to other
packages outside third_party.

Previously, restoreAbsolute() didn't return a package URI at all,
which would result in a relative path being suggested for a
missing import.

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

to

==========
Fix package URI calculation when in third_party but not third_party/dart

In this case we should use a dotted package name, similar to other
packages outside third_party.

Previously, restoreAbsolute() didn't return a package URI at all,
which would result in a relative path being suggested for a
missing import.

BUG=
R=brianwilkerson@google.com

Committed:
https://github.com/dart-lang/sdk/commit/ef48584f1f3469c8abb51ea4f4fe3da3e886ff26
==========

[skybrian, 2017-03-24 23:59:51]

Committed patchset #2 (id:20001) manually as
ef48584f1f3469c8abb51ea4f4fe3da3e886ff26 (presubmit successful).