Bug 704175 part 1. Rename onBeforePaint to sample for animation frame callbacks. r=roc

dom/interfaces/base/nsIAnimationFrameListener.idl

@@ -46,8 +46,7 @@
 interface nsIAnimationFrameListener : nsISupports
 {
   /**
-   * The timestamp is the same as it would be for the a corresponding
-   * MozBeforePaint event.
+   * The timestamp is the time to be used for the animation sample.
    */
-  void onBeforePaint(in DOMTimeStamp timeStamp);
+  void sample(in DOMTimeStamp timeStamp);
 };

layout/base/nsRefreshDriver.cpp

@@ -392,7 +392,7 @@ nsRefreshDriver::Notify(nsITimer *aTimer)
       }
 
       for (PRUint32 i = 0; i < animationListeners.Length(); ++i) {
-        animationListeners[i]->OnBeforePaint(eventTime);
+        animationListeners[i]->Sample(eventTime);
       }
 
       // This is the Flush_Style case.

mobile/xul/chrome/content/AnimatedZoom.js

@@ -132,7 +132,7 @@ const AnimatedZoom = {
     return this.beginTime != null;
   },
 
-  onBeforePaint: function(aTimeStamp) {
+  sample: function(aTimeStamp) {
     try {
       let tdiff = aTimeStamp - this.beginTime;
       let counter = tdiff / this.animationDuration;

mobile/xul/chrome/content/input.js

@@ -175,7 +175,7 @@ MouseModule.prototype = {
     }
   },
 
-  onBeforePaint: function onBeforePaint(aTimeStamp) {
+  sample: function sample(aTimeStamp) {
     this._waitingForPaint = false;
   },
 
@@ -889,7 +889,7 @@ KineticController.prototype = {
     }
 
     let callback = {
-      onBeforePaint: function kineticHandleEvent(timeStamp) {
+      sample: function kineticHandleEvent(timeStamp) {
         // Someone called end() on us between timer intervals
         // or we are paused.
         if (!self.isActive() || self._paused)