Bug 1010538 - Part 1 - Style support for scroll-behavior.  r=mstange
- Implemented boilerplate to add the scroll-behavior CSS property.
- Added layout.css.scroll-behavior.property-enabled preference to
  allow the scroll-behavior CSS property to be enabled independently
  of the CSSOM-View DOM scrolling api extensions for smooth scrolling.
Bug 1010538 - Part 2 - Add scroll-behavior to ScrollbarStyles. r=mstange
- ScrollbarStyles extended to support the scroll-behavior CSS property
- Corrected naming of parameters to ScrollbarStyles CTOR
Bug 1010538 - Part 3 - Implement scroll-behavior CSS property. r=mstange
- Added SCROLL_SMOOTH_AUTO flag to nsIPresShell to enable selection of
  scroll behavior through CSS.
- Updated Element and Window scrolling DOM methods to enable smooth scrolling
  set through the scroll-behavior CSS property.
- Keyboard, scroll bar, mousewheel, and any other events that scroll smoothly
  with the general.smoothScroll preference enabled will now scroll instantly
  if the scroll frame has "scroll-behavior: instant" applied through CSS.
Bug 1010538 - Part 4 - Tests. r=mstange
scroll-behavior-1.html - Viewport Scrolling, expected to be smooth:
- DOM Method not specifying scroll-behavior, for <body> tag with 'scroll-behavior: smooth’

scroll-behavior-2.html - Div Scrolling, expected to be smooth:
- DOM Method not specifying scroll-behavior, for <div> tag with 'scroll-behavior: smooth’
- DOM Method specifying ‘auto’ scroll-behavior, for <div> tag with ‘scroll-behavior: smooth’
- DOM Method specifying 'smooth’ scroll-behavior, for <div> tag with ‘scroll-behavior: smooth’
- DOM Method specifying ‘smooth’ scroll-behavior, for <div> tag with ‘scroll-behavior: instant’
- DOM Method specifying ‘smooth’ scroll-behavior, for <div> tag with ‘scroll-behavior: auto’
- DOM Method specifying ‘smooth’ scroll-behavior, for <div> tag with no scroll-behavior attribute.

scroll-behavior-3.html - Div Scrolling, expected to be instant:
- DOM Method not specifying scroll-behavior, for <div> tag with ‘scroll-behavior: instant’
- DOM Method not specifying scroll-behavior, for <div> tag with ‘scroll-behavior: auto’
- DOM Method not specifying scroll-behavior, for <div> tag with no scroll-behavior attribute.
- DOM Method specifying ‘instant’ scroll-behavior, for <div> tag with ‘scroll-behavior: smooth’
- DOM Method specifying ‘instant’ scroll-behavior, for <div> tag with ‘scroll-behavior: instant’
- DOM Method specifying ‘instant’ scroll-behavior, for <div> tag with ‘scroll-behavior: auto’
- DOM Method specifying ‘instant’ scroll-behavior, for <div> tag with no scroll-behavior attribute.
- DOM Method specifying ‘auto’ scroll-behavior, for <div> tag with ‘scroll-behavior: instant’
- DOM Method specifying ‘auto’ scroll-behavior, for <div> tag with ‘scroll-behavior: auto’
- DOM Method specifying ‘auto’ scroll-behavior, for <div> tag with no scroll-behavior attribute.
Bug 1010538 - Part 5 - Enable automatic smooth scrolling for anchor links. r=mstange
- When an anchor link is clicked, the SCROLL_SMOOTH_AUTO flag is now set by
  PresShell::GoToAnchor when calling PresShell::ScrollContentIntoView.
- Added an arguement, aAnimateScroll, to PresShell:GoToAnchor to indicate that
  the scroll may be animated.  This will only be set to true when an anchor
  link is clicked.  Opening a page with an anchor link will not trigger
  such animations.
Bug 1010538 - Part 6 - Anchor Link Scrolling Tests. r=mstange

scroll-behavior-4.html - Anchor Link Scrolling
- Navigate to Anchor, for <div> tag with no ‘scroll-behavior’ attribute.
  Expected to be instantaneous.
- Navigate to Anchor, for <div> tag with ‘scroll-behavior: auto’.
  Expected to be instantaneous.
- Navigate to Anchor, for <div> tag with ‘scroll-behavior: instant’.
  Expected to be instantaneous.
- Navigate to Anchor, for <div> tag with ‘scroll-behavior: smooth’.
  Expected to be smooth.
Bug 1010538 - Part 7 - Add support to Element.ScrollLeft and Element.ScrollTop. r=mstange
- Setting Element.ScrollLeft or Element.ScrollRight will now scroll smoothly
  if the scroll-behavior CSS property is set to "smooth".
Bug 1010538 - Part 8 - Element.ScrollLeft and Element.ScrollTop Tests. r=mstange

scroll-behavior-5.html - Element.ScrollLeft and Element.ScrollTop scroll-behavior tests
- Set Element.ScrollLeft and Element.ScrollTop, for <div> tag with
  no 'scroll-behavior' attribute.  Expected to be instantaneous.
- Set Element.ScrollLeft and Element.ScrollTop, for <div> tag with
  'scroll-behavior: auto'.  Expected to be instantaneous.
- Set Element.ScrollLeft and Element.ScrollTop, for <div> tag with
  'scroll-behavior: instant'.  Expected to be instantaneous.
- Set Element.ScrollLeft and Element.ScrollTop, for <div> tag with
  'scroll-behavior: smooth'.  Expected to be smooth.
Bug 1045754 - Part 1 - Implement updated CSSOM-View smooth-scrolling specification. r=bz
- Added new WebIDL dictionary, ScrollToOptions.  This dictionary extends
  ScrollOptions by adding "left" and "top", specifying the scroll offset.
  This will be later extended with more members to allow scroll offsets to be
  specified with logical axes.
- Implemented Window.Scroll, Window.ScrollTo, Window.ScrollBy, Element.Scroll,
  Element.ScrollTo, and Element.ScrollBy functions that accept ScrollToOptions
  as a single parameter.
- Removed ScrollOptions dictionary parameter from existing Window.Scroll,
  Window.ScrollTo, and Window.ScrollBy functions as these have been replaced
  with functions accepting a single parameter, ScrollToOptions.
- Added new WebIDL dictionary, ScrollIntoViewOptions.  This dictionary
  extends ScrollOptions by adding "block", specifying whether the element
  start or end will be scrolled into view.
- Replaced Element.ScrollIntoView(bool,ScrollOptions) with
  Element.ScrollIntoView(ScrollIntoViewOptions) to match updated
  CSSOM-View scroll-behavior specification.
Bug 1045754 - Part 2 - Tests. r=bz
- Updated smooth scroll behavior mochitest and reftests to
  match new CSSOM-View DOM scrolling method parameters.
- Added tests for Element.ScrollBy and Element.ScrollTo.