Fixes a race condition in googleclient/chrome/symbolizer/frontend/http_test.go.

In Go a channel close operation establishes a 'happens-before' relation with the expression, which receives the sentinel zero value. The existing implementation, though, didn't guarantee that the sentinel zero was reached, resulting in a race between two goroutines.

CL=55892208
DATE=2013/10/30
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Created by MOE: http://code.google.com/p/moe-java
MOE_MIGRATED_REVID=55892208
crsym: UI redesign.

* Removes the separate help page in favor of inline help.
* Rewrites the JS to use AngularJS.
* Use Bootstrap 2 for styling.

CL=58273712
DATE=2013/12/16
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Created by MOE: http://code.google.com/p/moe-java
MOE_MIGRATED_REVID=58273712
crsym: Add support for Apple 10.9 v18 hang reports.

CL=58993574
DATE=2014/01/02
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Created by MOE: http://code.google.com/p/moe-java
MOE_MIGRATED_REVID=58993574
Add support for Apple 10.9 crash v11 reports. These are the same as v10.

CL=59000528
DATE=2014/01/02
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Created by MOE: http://code.google.com/p/moe-java
MOE_MIGRATED_REVID=59000528