Implement requestAnimationFrame

Cherry-pick from webkit-org branch on Code Aurora Forum:

requestAnimationFrame doesn't throttle on Mac
https://www.codeaurora.org/gitweb/quic/la/?p=platform/external/webkit.git;a=commit;h=d9dca741b4762c433ae18f7a1bc59a3a81861fc8

Timestamp parameter to requestAnimationFrame is busted in USE(REQUEST_ANIMATION_FRAME_TIMER) path
https://www.codeaurora.org/gitweb/quic/la/?p=platform/external/webkit.git;a=commit;h=f0909a46fa167c84062c63caffef340a6054bc1e

Rename webkitCancelRequestAnimationFrame to webkitCancelAnimationFrame to match spec change
https://www.codeaurora.org/gitweb/quic/la/?p=platform/external/webkit.git;a=commit;h=cd5d11d662d638b3e4dfda33f23cda907f007f12

Remove partially implemented per-Element visibility checks from requestAnimationFrame logic
https://www.codeaurora.org/gitweb/quic/la/?p=platform/external/webkit.git;a=commit;h=9fb90af3cebd0e595990cded0941d230cf77dcc1

(cherry picked from commit 47ff59a279eab9ae5dd1fd17ce7057431750a0b5)

Change-Id: I7e77200006bb0c4cd4b4209082296c425bd207c1

1 files changed, 13 insertions, 2 deletions

diff --git a/Source/WebCore/dom/ScriptedAnimationController.h b/Source/WebCore/dom/ScriptedAnimationController.h
index 7141968..f6f06a9 100644
--- a/Source/WebCore/dom/ScriptedAnimationController.h
+++ b/Source/WebCore/dom/ScriptedAnimationController.h
@@ -28,6 +28,9 @@
 
 #if ENABLE(REQUEST_ANIMATION_FRAME)
 #include "DOMTimeStamp.h"
+#if USE(REQUEST_ANIMATION_FRAME_TIMER)
+#include "Timer.h"
+#endif
 #include <wtf/Noncopyable.h>
 #include <wtf/PassOwnPtr.h>
 #include <wtf/RefPtr.h>
@@ -36,7 +39,6 @@
 namespace WebCore {
 
 class Document;
-class Element;
 class RequestAnimationFrameCallback;
 
 class ScriptedAnimationController {
@@ -49,7 +51,7 @@ public:
 
     typedef int CallbackId;
 
-    CallbackId registerCallback(PassRefPtr<RequestAnimationFrameCallback>, Element*);
+    CallbackId registerCallback(PassRefPtr<RequestAnimationFrameCallback>);
     void cancelCallback(CallbackId);
     void serviceScriptedAnimations(DOMTimeStamp);
 
@@ -58,12 +60,21 @@ public:
 
 private:
     explicit ScriptedAnimationController(Document*);
+
     typedef Vector<RefPtr<RequestAnimationFrameCallback> > CallbackList;
     CallbackList m_callbacks;
 
     Document* m_document;
     CallbackId m_nextCallbackId;
     int m_suspendCount;
+
+    void scheduleAnimation();
+
+#if USE(REQUEST_ANIMATION_FRAME_TIMER)
+    void animationTimerFired(Timer<ScriptedAnimationController>*);
+    Timer<ScriptedAnimationController> m_animationTimer;
+    double m_lastAnimationFrameTime;
+#endif
 };
 
 }