Reland r107720 - Enable the new layer animation framework.

ui/gfx/compositor/layer_animation_sequence.cc

Index: ui/gfx/compositor/layer_animation_sequence.cc
diff --git a/ui/gfx/compositor/layer_animation_sequence.cc b/ui/gfx/compositor/layer_animation_sequence.cc
index f0deca6a71d74f0e8d2e5474625f2cf4edb1933e..8f34969d6801439cc6cc3e639da280662bec38e0 100644
--- a/ui/gfx/compositor/layer_animation_sequence.cc
+++ b/ui/gfx/compositor/layer_animation_sequence.cc
@@ -29,7 +29,6 @@ LayerAnimationSequence::~LayerAnimationSequence() {
 
 void LayerAnimationSequence::Progress(base::TimeDelta elapsed,
                                       LayerAnimationDelegate* delegate) {
-  TRACE_EVENT0("LayerAnimationSequence", "Progress");
   if (elements_.size() == 0 || duration_ == base::TimeDelta())
     return;
 
@@ -69,6 +68,15 @@ void LayerAnimationSequence::Progress(base::TimeDelta elapsed,
   }
 }
 
+void LayerAnimationSequence::GetTargetValue(
+    LayerAnimationElement::TargetValue* target) const {
+  if (is_cyclic_)
+    return;
+
+  for (size_t i = last_element_; i < elements_.size(); ++i)
+    elements_[i]->GetTargetValue(target);
+}
+
 void LayerAnimationSequence::Abort() {
   size_t current_index = last_element_ % elements_.size();
   while (current_index < elements_.size()) {