Fix DisambiguateProperties handling of quoted properties

Fixes issue 1024
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Created by MOE: http://code.google.com/p/moe-java
MOE_MIGRATED_REVID=51382261
Added some chrome.sockets externs as defined in http://developer.chrome.com/apps/socket.html.
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Created by MOE: http://code.google.com/p/moe-java
MOE_MIGRATED_REVID=51408701