Convert CC scheduler logic to use base::TimeTicks/Delta instead of doubles

cc/CCLayerTreeHostImpl.cpp

 // Copyright 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "config.h"
 
 #include "CCLayerTreeHostImpl.h"
 
 #include "CCAppendQuadsData.h"
 #include "CCDamageTracker.h"
@@ skipping 1199 matching lines @@
 
     if (!events->isEmpty())
         m_client->postAnimationEventsToMainThreadOnImplThread(events.release(), wallClockTime);
 
     if (didAnimate)
         m_client->setNeedsRedrawOnImplThread();
 
     setBackgroundTickingEnabled(!m_visible && m_needsAnimateLayers);
 }
 
-double CCLayerTreeHostImpl::lowFrequencyAnimationInterval() const
+base::TimeDelta CCLayerTreeHostImpl::lowFrequencyAnimationInterval() const
 {
-    return 1;
+    return base::TimeDelta::FromSeconds(1);
 }
 
 void CCLayerTreeHostImpl::sendDidLoseContextRecursive(CCLayerImpl* current)
 {
     ASSERT(current);
     current->didLoseContext();
     if (current->maskLayer())
         sendDidLoseContextRecursive(current->maskLayer());
     if (current->replicaLayer())
         sendDidLoseContextRecursive(current->replicaLayer());
@@ skipping 58 matching lines @@
 
     CCScrollbarAnimationController* scrollbarController = layer->scrollbarAnimationController();
     if (scrollbarController && scrollbarController->animate(monotonicTime))
         m_client->setNeedsRedrawOnImplThread();
 
     for (size_t i = 0; i < layer->children().size(); ++i)
         animateScrollbarsRecursive(layer->children()[i], monotonicTime);
 }
 
 } // namespace cc