Bug 96040 - Web Inspector: Allow extensions to open FilteredItemSelectorDialog
 Issue 125036:	[devtools] Support devtools extension access to backend protocol (chrome.devtools.remoteDebug)
Issue 125270:	[devtools] chrome.devtools.protocol wrapper for remote debug clients in devtools extensions
https://code.google.com/p/chromium/issues/detail?id=125270
Extension for 80992 and 104384: preprocess scripts in extensions
runExtensionTests has a funky url rewritting to fix.
Traceur cannot parse code with 'interface', 
https://github.com/google/traceur-compiler/issues/241