Fix live development connection in Chrome 27 beta

[jasonsanjose]

Fix for #3402

• Change Inspector domain methods to return a promise if no explicit callback parameter is defined
• Force Page domain to load prior to loading other agents (some agents wait for Page loadEventFired event...yes the name is from the department of redundancy department)
• Wait for domain enable calls to complete before agent loading continues
• Misc event handler cleanup

@njx can you retest on mac w/ chrome 27? I've tested mac Chrome 26 and win Chrome 27.

[redmunds]

I'm having a problem in Chrome Version 26.0.1410.64 m (not 27 beta) on Win7. CSS updates correctly while typing and I can update (and save) HTML, but only once. After that non of my HTML edits are reflected in Chrome (but CSS still updates). This happens with both builtin node js server and Base Url (with local wamp server).

In console, I am seeing lots of errors: Failed to load resource http://127.0.0.1:9222/json and ConsoleAgent: Port error: Could not establish connection. Receiving end does not exist. in chromeHidden.Port.dispatchOnDisconnect:17.

[jasonsanjose]

I'm trying to retest with Chrome 26 on windows, but I've somehow gotten to a state where Brackets won't even launch Chrome for live preview. I may have to ditch my VM and start over.

[redmunds]

Looks good. Merging.

[jasonsanjose]

I was finally able to retest and confirm the fix on windows chrome 26.