Add a "--log" option to analysis server to dump log messages to a file.

Add a "--log" option to analysis server to dump log messages to a file.

R=brianwilkerson@google.com, jwren@google.com

Committed: https://code.google.com/p/dart/source/detail?r=37902

[jwren, 2014-07-01 16:53:42]

On 2014/07/01 16:27:31, Paul Berry wrote:

LGTM

[Brian Wilkerson, 2014-07-01 17:30:01]

https://codereview.chromium.org/360973002/diff/1/pkg/analysis_server/lib/driv...
File pkg/analysis_server/lib/driver.dart (right):

https://codereview.chromium.org/360973002/diff/1/pkg/analysis_server/lib/driv...
pkg/analysis_server/lib/driver.dart:76: sink.writeln(record);
Where do we close the file?

[Paul Berry, 2014-07-01 17:51:12]

https://codereview.chromium.org/360973002/diff/1/pkg/analysis_server/lib/driv...
File pkg/analysis_server/lib/driver.dart (right):

https://codereview.chromium.org/360973002/diff/1/pkg/analysis_server/lib/driv...
pkg/analysis_server/lib/driver.dart:76: sink.writeln(record);
On 2014/07/01 17:30:01, Brian Wilkerson wrote:
> Where do we close the file?

We just let the OS close it for us when the process terminates.  I considered
closing it manually but it didn't seem worth the effort.

[Brian Wilkerson, 2014-07-01 18:41:25]

LGTM

[Paul Berry, 2014-07-01 20:22:25]

Committed patchset #1 manually as r37902 (presubmit successful).