Revert "Do nothing if [changeFile] reported, but the file content is the same."

Revert "Do nothing if [changeFile] reported, but the file content is the same."

This reverts commit 1ffda5601ba5af87248ae87d58e8cf6fcda48d8b.

There is a bug with reporting changeFile() twice, first time the change
be noticed and the file content hash updated. But the second time the
content hash is the same, and we unschedule the file from analysis :-(

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

Committed: https://github.com/dart-lang/sdk/commit/1bdee25bdfbd5fd29f17f24236813244f76e03fd

[scheglov, 2016-10-29 01:06:51]

Description was changed from

==========
Revert "Do nothing if [changeFile] reported, but the file content is the same."

This reverts commit 1ffda5601ba5af87248ae87d58e8cf6fcda48d8b.

There is a bug with reporting changeFile() twice, first time the change
be noticed and the file content hash updated. But the second time the
content hash is the same, and we unschedule the file from analysis :-(

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

to

==========
Revert "Do nothing if [changeFile] reported, but the file content is the same."

This reverts commit 1ffda5601ba5af87248ae87d58e8cf6fcda48d8b.

There is a bug with reporting changeFile() twice, first time the change
be noticed and the file content hash updated. But the second time the
content hash is the same, and we unschedule the file from analysis :-(

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

Committed:
https://github.com/dart-lang/sdk/commit/1bdee25bdfbd5fd29f17f24236813244f76e03fd
==========

[scheglov, 2016-10-29 01:06:53]

Committed patchset #1 (id:1) manually as
1bdee25bdfbd5fd29f17f24236813244f76e03fd (presubmit successful).

[Brian Wilkerson, 2016-10-31 14:06:54]

lgtm