In PageAnimator iterate through collected documents instead of frames

Source/core/page/PageAnimator.cpp

Index: Source/core/page/PageAnimator.cpp
diff --git a/Source/core/page/PageAnimator.cpp b/Source/core/page/PageAnimator.cpp
index 0412bd9adc3d5e2601c605b812c633d12494a35e..0fd03145c9273b25d5d2d74905423020c3ac87b0 100644
--- a/Source/core/page/PageAnimator.cpp
+++ b/Source/core/page/PageAnimator.cpp
@@ -28,22 +28,22 @@ void PageAnimator::serviceScriptedAnimations(double monotonicAnimationStartTime)
     m_animationFramePending = false;
     TemporaryChange<bool> servicing(m_servicingAnimations, true);
 
-    for (RefPtr<Frame> frame = m_page->mainFrame(); frame; frame = frame->tree().traverseNext()) {
-        if (frame->isLocalFrame()) {
-            RefPtr<LocalFrame> localFrame = toLocalFrame(frame.get());
-            localFrame->view()->serviceScrollAnimations(monotonicAnimationStartTime);
-
-            DocumentAnimations::updateAnimationTimingForAnimationFrame(*localFrame->document(), monotonicAnimationStartTime);
-            SVGDocumentExtensions::serviceOnAnimationFrame(*localFrame->document(), monotonicAnimationStartTime);
-        }
-    }
-
     WillBeHeapVector<RefPtrWillBeMember<Document> > documents;
     for (Frame* frame = m_page->mainFrame(); frame; frame = frame->tree().traverseNext()) {
         if (frame->isLocalFrame())
             documents.append(toLocalFrame(frame)->document());
     }
 
+    for (size_t i = 0; i < documents.size(); ++i) {
+        if (documents[i]->frame())
+            documents[i]->view()->serviceScrollAnimations(monotonicAnimationStartTime);
+    }
+
+    for (size_t i = 0; i < documents.size(); ++i) {
+        DocumentAnimations::updateAnimationTimingForAnimationFrame(*documents[i], monotonicAnimationStartTime);
+        SVGDocumentExtensions::serviceOnAnimationFrame(*documents[i], monotonicAnimationStartTime);
+    }
+
     for (size_t i = 0; i < documents.size(); ++i)
         documents[i]->serviceScriptedAnimations(monotonicAnimationStartTime);
 }