Web Animations: Use a single animation clock

third_party/WebKit/Source/core/page/PageAnimator.h

Index: third_party/WebKit/Source/core/page/PageAnimator.h
diff --git a/third_party/WebKit/Source/core/page/PageAnimator.h b/third_party/WebKit/Source/core/page/PageAnimator.h
index d1f547fa4222903f91fe1d40da64b7a5a729fc84..436f473c8290c7a142fd827fbd6f3f7b86d2dee8 100644
--- a/third_party/WebKit/Source/core/page/PageAnimator.h
+++ b/third_party/WebKit/Source/core/page/PageAnimator.h
@@ -6,6 +6,7 @@
 #define PageAnimator_h
 
 #include "core/CoreExport.h"
+#include "core/animation/AnimationClock.h"
 #include "platform/heap/Handle.h"
 
 namespace blink {
@@ -23,6 +24,7 @@ public:
     bool isServicingAnimations() const { return m_servicingAnimations; }
     void updateLayoutAndStyleForPainting(LocalFrame& rootFrame);
     void updateAllLifecyclePhases(LocalFrame& rootFrame);
+    AnimationClock& clock() { return m_animationClock; }
 
 private:
     explicit PageAnimator(Page&);
@@ -30,6 +32,7 @@ private:
     RawPtrWillBeMember<Page> m_page;
     bool m_servicingAnimations;
     bool m_updatingLayoutAndStyleForPainting;
+    AnimationClock m_animationClock;
 };
 
 }