Removing the use of base::Time inside the LayerTreeHost system.

cc/trees/single_thread_proxy.cc

Index: cc/trees/single_thread_proxy.cc
diff --git a/cc/trees/single_thread_proxy.cc b/cc/trees/single_thread_proxy.cc
index dcd4cf679b74500ee3ad7fa901d675f6700de710..b57e766de7018c2829679d4c29c89d79eacd3682 100644
--- a/cc/trees/single_thread_proxy.cc
+++ b/cc/trees/single_thread_proxy.cc
@@ -328,12 +328,12 @@ void SingleThreadProxy::SetNeedsCommitOnImplThread() {
 
 void SingleThreadProxy::PostAnimationEventsToMainThreadOnImplThread(
     scoped_ptr<AnimationEventsVector> events,
-    base::Time wall_clock_time) {
+    base::TimeTicks clock_time) {
   TRACE_EVENT0(
       "cc", "SingleThreadProxy::PostAnimationEventsToMainThreadOnImplThread");
   DCHECK(Proxy::IsImplThread());
   DebugScopedSetMainThread main(this);
-  layer_tree_host_->SetAnimationEvents(events.Pass(), wall_clock_time);
+  layer_tree_host_->SetAnimationEvents(events.Pass(), clock_time);
 }
 
 bool SingleThreadProxy::ReduceContentsTextureMemoryOnImplThread(
@@ -532,8 +532,7 @@ bool SingleThreadProxy::DoComposite(
     }
 
     layer_tree_host_impl_->Animate(
-        layer_tree_host_impl_->CurrentFrameTimeTicks(),
-        layer_tree_host_impl_->CurrentFrameTime());
+        layer_tree_host_impl_->CurrentFrameTimeTicks());
     UpdateBackgroundAnimateTicking();
 
     if (!layer_tree_host_impl_->IsContextLost()) {