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

cc/CCThreadedTest.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 "CCThreadedTest.h"
 
 #include "CCActiveAnimation.h"
 #include "CCAnimationTestCommon.h"
@@ skipping 102 matching lines @@
     m_testHooks->drawLayersOnCCThread(this);
 }
 
 void MockLayerTreeHostImpl::animateLayers(double monotonicTime, double wallClockTime)
 {
     m_testHooks->willAnimateLayers(this, monotonicTime);
     CCLayerTreeHostImpl::animateLayers(monotonicTime, wallClockTime);
     m_testHooks->animateLayers(this, monotonicTime);
 }
 
-double MockLayerTreeHostImpl::lowFrequencyAnimationInterval() const
+base::TimeDelta MockLayerTreeHostImpl::lowFrequencyAnimationInterval() const
 {
-    return 1.0 / 60;
+    return base::TimeDelta::FromMilliseconds(16);
 }
 
 MockLayerTreeHostImpl::MockLayerTreeHostImpl(TestHooks* testHooks, const CCLayerTreeSettings& settings, CCLayerTreeHostImplClient* client)
     : CCLayerTreeHostImpl(settings, client)
     , m_testHooks(testHooks)
 {
 }
 
 // Adapts CCLayerTreeHost for test. Injects MockLayerTreeHostImpl.
 class MockLayerTreeHost : public cc::CCLayerTreeHost {
@@ skipping 405 matching lines @@
     if (m_timedOut) {
         FAIL() << "Test timed out";
         Platform::current()->compositorSupport()->shutdown();
         return;
     }
     afterTest();
     Platform::current()->compositorSupport()->shutdown();
 }
 
 } // namespace WebKitTests