Blink Support for Overlay Scrollbar Animation

Source/platform/scroll/ScrollAnimatorNone.cpp

 /*
  * Copyright (c) 2011, Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 14 matching lines @@
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "config.h"
 
 #include "platform/scroll/ScrollAnimatorNone.h"
 
-#include <algorithm>
+#include "platform/TraceEvent.h"
 #include "platform/scroll/ScrollableArea.h"
 #include "wtf/CurrentTime.h"
 #include "wtf/PassOwnPtr.h"
+#include <algorithm>
 
 #include "platform/TraceEvent.h"
 
-namespace blink {
+namespace {
 
 const double kFrameRate = 60;
 const double kTickTime = 1 / kFrameRate;
 const double kMinimumTimerInterval = .001;
 
+} // namespace
+
+namespace blink {
+
 PassOwnPtr<ScrollAnimator> ScrollAnimator::create(ScrollableArea* scrollableArea)
 {
     if (scrollableArea && scrollableArea->scrollAnimatorEnabled())
         return adoptPtr(new ScrollAnimatorNone(scrollableArea));
     return adoptPtr(new ScrollAnimator(scrollableArea));
 }
 
 ScrollAnimatorNone::Parameters::Parameters()
     : m_isEnabled(false)
 {
@@ skipping 423 matching lines @@
     m_verticalData.updateVisibleLength(scrollableArea()->visibleHeight());
 }
 
 void ScrollAnimatorNone::animationTimerFired()
 {
     TRACE_EVENT0("blink", "ScrollAnimatorNone::animationTimerFired");
 
     double currentTime = WTF::monotonicallyIncreasingTime();
 
     bool continueAnimation = false;
+
     if (m_horizontalData.m_startTime && m_horizontalData.animateScroll(currentTime))
         continueAnimation = true;
     if (m_verticalData.m_startTime && m_verticalData.animateScroll(currentTime))
         continueAnimation = true;
 
     if (continueAnimation)
         startNextTimer();
     else
         m_animationActive = false;
 
@@ skipping 15 matching lines @@
     return m_animationActive;
 }
 
 void ScrollAnimatorNone::stopAnimationTimerIfNeeded()
 {
     if (animationTimerActive())
         m_animationActive = false;
 }
 
 } // namespace blink