Backed out changeset 347d5704cbe1 (bug 930793) for frequent Linux mochitest-bc orange.

content/base/src/nsContentSink.cpp

content/base/src/nsContentSink.h

docshell/base/nsDocShell.cpp

dom/tests/mochitest/general/test_vibrator.html

...tests/mochitest/pointerlock/file_screenClientXYConst.html

layout/base/nsRefreshDriver.cpp

view/public/nsViewManager.h

view/src/nsViewManager.cpp

widget/cocoa/nsChildView.h

widget/cocoa/nsChildView.mm

widget/gtk/nsWindow.cpp

widget/gtk/nsWindow.h

widget/nsIAppShell.idl

widget/nsIWidget.h

widget/windows/nsWindow.cpp

widget/windows/nsWindow.h

widget/windows/winrt/MetroWidget.cpp

widget/windows/winrt/MetroWidget.h

widget/xpwidgets/nsBaseAppShell.cpp

widget/xpwidgets/nsBaseAppShell.h