Web Animations: Address some review feedback to clean up CSS Animations

Source/core/animation/ActiveAnimations.h

Index: Source/core/animation/ActiveAnimations.h
diff --git a/Source/core/animation/ActiveAnimations.h b/Source/core/animation/ActiveAnimations.h
index 824ca95a269c22b6aefc7271ac150c9d4f3aaf75..b57283b770617b2c8f361da2f06f9f1d6f81d94a 100644
--- a/Source/core/animation/ActiveAnimations.h
+++ b/Source/core/animation/ActiveAnimations.h
@@ -44,9 +44,9 @@ public:
     // Animations that are currently active for this element, their effects will be applied
     // during a style recalc.
     AnimationStack* defaultStack() { return &m_defaultStack; }
-    // Tracks the state of active CSS Animations. When active the individual animations will
-    // also be part of the default stack, but the mapping betwen animation name and player
-    // is kept here.
+    // Tracks the state of active CSS Animations. The individual animations will also be
+    // part of the default stack, but the mapping betwen animation name and player is kept
+    // here.
     CSSAnimations* cssAnimations() { return &m_cssAnimations; }
     // FIXME: Add AnimationStack for CSS Transitions
     // CSS Transitions form a separate animation stack as they apply at a different level of