The change to RootAccessible.cpp fixes an obvious bug introduced in bug 741707.
The visibility changes in gfx/thebes are because NS_DECL_ISUPPORTS has a
trailing "public:" that those classes were relying on to have public
constructors.
MozReview-Commit-ID: IeB8KIJCGhU
There may be some pending input events in the queue of thread when content starts a dnd operation. Spec says that input events should be suppressed when there is a dnd operation. Add a flag in ESM and turn on/off when start/finish a dnd operation. Checking the flag in PresShell::HandleEvent because we may start a dnd operation with pointermove and we want to suppress the mousemove as well.
MozReview-Commit-ID: 43NZrA7SW4c
