Update watch docs.

Update watch docs.

BUG=
R=sgjesse@google.com

Committed: https://code.google.com/p/dart/source/detail?r=40589

[Anders Johnsen, 2014-09-23 11:11:31]

ajohnsen@google.com changed reviewers:
+ sgjesse@google.com

[Søren Gjesse, 2014-09-23 11:21:42]

https://codereview.chromium.org/589373002/diff/1/sdk/lib/io/file_system_entit...
File sdk/lib/io/file_system_entity.dart (right):

https://codereview.chromium.org/589373002/diff/1/sdk/lib/io/file_system_entit...
sdk/lib/io/file_system_entity.dart:422: * If the system is unable to pair a
move-event, the event may be rewritten
This is a bit out of the blue. There is no mentioning of paring move events
above, so some more documentation is needed here.

[Anders Johnsen, 2014-09-23 11:30:07]

PTAL

https://codereview.chromium.org/589373002/diff/1/sdk/lib/io/file_system_entit...
File sdk/lib/io/file_system_entity.dart (right):

https://codereview.chromium.org/589373002/diff/1/sdk/lib/io/file_system_entit...
sdk/lib/io/file_system_entity.dart:422: * If the system is unable to pair a
move-event, the event may be rewritten
On 2014/09/23 11:21:41, Søren Gjesse wrote:
> This is a bit out of the blue. There is no mentioning of paring move events
> above, so some more documentation is needed here.

Simplified a bit - no longer any mention to how we do things.

[Søren Gjesse, 2014-09-23 11:30:45]

lgtm

[Anders Johnsen, 2014-09-23 11:35:38]

Committed patchset #2 (id:20001) manually as 40589 (presubmit successful).