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

5 files changed, 14 insertions, 10 deletions

diff --git a/Source/WebCore/page/Chrome.cpp b/Source/WebCore/page/Chrome.cpp
index dce7d33..33491fb 100644
--- a/Source/WebCore/page/Chrome.cpp
+++ b/Source/WebCore/page/Chrome.cpp
@@ -474,7 +474,9 @@ void Chrome::setCursor(const Cursor& cursor)
 #if ENABLE(REQUEST_ANIMATION_FRAME)
 void Chrome::scheduleAnimation()
 {
+#if !USE(REQUEST_ANIMATION_FRAME_TIMER)
     m_client->scheduleAnimation();
+#endif
 }
 #endif
 
diff --git a/Source/WebCore/page/ChromeClient.h b/Source/WebCore/page/ChromeClient.h
index 0ec366b..e422610 100644
--- a/Source/WebCore/page/ChromeClient.h
+++ b/Source/WebCore/page/ChromeClient.h
@@ -153,7 +153,7 @@ namespace WebCore {
         virtual PlatformPageClient platformPageClient() const = 0;
         virtual void scrollbarsModeDidChange() const = 0;
         virtual void setCursor(const Cursor&) = 0;
-#if ENABLE(REQUEST_ANIMATION_FRAME)
+#if ENABLE(REQUEST_ANIMATION_FRAME) && !USE(REQUEST_ANIMATION_FRAME_TIMER)
         virtual void scheduleAnimation() = 0;
 #endif
         // End methods used by HostWindow.
diff --git a/Source/WebCore/page/DOMWindow.cpp b/Source/WebCore/page/DOMWindow.cpp
index c7f162a..177c498 100644
--- a/Source/WebCore/page/DOMWindow.cpp
+++ b/Source/WebCore/page/DOMWindow.cpp
@@ -1517,17 +1517,17 @@ void DOMWindow::clearInterval(int timeoutId)
 }
 
 #if ENABLE(REQUEST_ANIMATION_FRAME)
-int DOMWindow::webkitRequestAnimationFrame(PassRefPtr<RequestAnimationFrameCallback> callback, Element* e)
+int DOMWindow::webkitRequestAnimationFrame(PassRefPtr<RequestAnimationFrameCallback> callback)
 {
     if (Document* d = document())
-        return d->webkitRequestAnimationFrame(callback, e);
+        return d->webkitRequestAnimationFrame(callback);
     return 0;
 }
 
-void DOMWindow::webkitCancelRequestAnimationFrame(int id)
+void DOMWindow::webkitCancelAnimationFrame(int id)
 {
     if (Document* d = document())
-        d->webkitCancelRequestAnimationFrame(id);
+        d->webkitCancelAnimationFrame(id);
 }
 #endif
 
diff --git a/Source/WebCore/page/DOMWindow.h b/Source/WebCore/page/DOMWindow.h
index 14ae79c..21c0f98 100644
--- a/Source/WebCore/page/DOMWindow.h
+++ b/Source/WebCore/page/DOMWindow.h
@@ -249,8 +249,9 @@ namespace WebCore {
 
         // WebKit animation extensions
 #if ENABLE(REQUEST_ANIMATION_FRAME)
-        int webkitRequestAnimationFrame(PassRefPtr<RequestAnimationFrameCallback>, Element*);
-        void webkitCancelRequestAnimationFrame(int id);
+        int webkitRequestAnimationFrame(PassRefPtr<RequestAnimationFrameCallback>);
+        void webkitCancelAnimationFrame(int id);
+        void webkitCancelRequestAnimationFrame(int id) { webkitCancelAnimationFrame(id); }
 #endif
 
         // Events
diff --git a/Source/WebCore/page/DOMWindow.idl b/Source/WebCore/page/DOMWindow.idl
index cbdd702..827c525 100644
--- a/Source/WebCore/page/DOMWindow.idl
+++ b/Source/WebCore/page/DOMWindow.idl
@@ -235,9 +235,10 @@ module window {
         void clearInterval(in long handle);
 
 #if defined(ENABLE_REQUEST_ANIMATION_FRAME)
-        // WebKit animation extensions
-        long webkitRequestAnimationFrame(in [Callback] RequestAnimationFrameCallback callback, in Element element);
-        void webkitCancelRequestAnimationFrame(in long id);
+        // WebKit animation extensions, being standardized in the WebPerf WG
+        long webkitRequestAnimationFrame(in [Callback] RequestAnimationFrameCallback callback);
+        void webkitCancelAnimationFrame(in long id);
+        void webkitCancelRequestAnimationFrame(in long id); // This is a deprecated alias for webkitCancelAnimationFrame(). Remove this when removing vendor prefix.
 #endif
 
         // Base64