Bug 886188 - add debuggins logs to diagnose test15 timeouts in test_preload_actions.html. r=cpearce
Bug 1102523 - Update intree libpng to version 1.6.15. r=jmuizelaar
Bug 1102906 - Fix immovable caret after drag-and-drop. r=roc

The deleted lines were added in bug 924692 part 4. It will incorrectly
disable the caret in PresShell so that the caret cannot be moved by
using keyboard in nsSelectMoveScrollCommand::DoCommand().
Bug 1103868 - "'SupportsD2D1' : is not a member of 'mozilla::gfx::Factory'". r=bas