Bug 1073336 part 10 - Add AnimationPlayer::GetAnimationManager(); r=dbaron

This patch introduces an abstract method to AnimationPlayer to fetch the manager
object associated with the player. This method is implemented separate by
CSSAnimationPlayer and CSSTransitionPlayer to return the nsAnimationManager or
nsTransitionManager accordingly.

dom/animation/AnimationPlayer.h

@@ -28,6 +28,7 @@ class nsPresContext;
 namespace mozilla {
 namespace css {
 class AnimValuesStyleRule;
+class CommonAnimationManager;
 } // namespace css
 
 class CSSAnimationPlayer;
@@ -130,6 +131,7 @@ protected:
 
   nsIDocument* GetRenderedDocument() const;
   nsPresContext* GetPresContext() const;
+  virtual css::CommonAnimationManager* GetAnimationManager() const = 0;
 
   nsRefPtr<AnimationTimeline> mTimeline;
   nsRefPtr<Animation> mSource;

layout/style/nsAnimationManager.cpp

@@ -152,6 +152,17 @@ CSSAnimationPlayer::QueueEvents(EventArray& aEventsToDispatch)
   }
 }
 
+CommonAnimationManager*
+CSSAnimationPlayer::GetAnimationManager() const
+{
+  nsPresContext* context = GetPresContext();
+  if (!context) {
+    return nullptr;
+  }
+
+  return context->AnimationManager();
+}
+
 /* static */ nsString
 CSSAnimationPlayer::PseudoTypeAsString(nsCSSPseudoElements::Type aPseudoType)
 {

layout/style/nsAnimationManager.h

@@ -78,6 +78,7 @@ public:
 
 protected:
   virtual ~CSSAnimationPlayer() { }
+  virtual css::CommonAnimationManager* GetAnimationManager() const MOZ_OVERRIDE;
 
   static nsString PseudoTypeAsString(nsCSSPseudoElements::Type aPseudoType);
 

layout/style/nsTransitionManager.cpp

@@ -88,6 +88,17 @@ CSSTransitionPlayer::PlayFromJS()
   AnimationPlayer::PlayFromJS();
 }
 
+CommonAnimationManager*
+CSSTransitionPlayer::GetAnimationManager() const
+{
+  nsPresContext* context = GetPresContext();
+  if (!context) {
+    return nullptr;
+  }
+
+  return context->TransitionManager();
+}
+
 /*****************************************************************************
  * nsTransitionManager                                                       *
  *****************************************************************************/

layout/style/nsTransitionManager.h

@@ -81,6 +81,8 @@ public:
 
 protected:
   virtual ~CSSTransitionPlayer() { }
+
+  virtual css::CommonAnimationManager* GetAnimationManager() const MOZ_OVERRIDE;
 };
 
 } // namespace mozilla