Add patch to disable renderer hang monitor when page is unloading.

We're doing some GUI work like asking for confirmation in the
beforeunload handler, so it's very likely that the renderer may seem
unresponsive. The default behavior of chromium is to close page, which
is of course not the thing we want.
Add patch to expose necessary members of URLRequestJob.
Add patch to expose "File" class's "path" attribute.
Add patch to fix webview's NSView on Mac.

1. Avoid capturing key event to menu.
https://github.com/atom/atom-shell/issues/170

2. Enable accepting first mouse event.
https://github.com/atom/atom-shell/issues/212
Add patch to suppress warning of CFAllocator.
Add patch to make iframe sandboxed by default.
Add patch to allow Ctrl+Alt accelerators on Windows.
Add patch to disable sandbox in SharedWorker.
Add patch to fix the wrong hittest in child.
Add patch to support showing mnemonics in text button.
Add patch to suppress to spam loggings from mojo.

Imported from:
http://src.chromium.org/viewvc/chrome/trunk/src/mojo/system/channel.cc?revision=275141