Animations: Introduce compositor AnimationPlayer and AnimationTimeline.

Source/web/ChromeClientImpl.cpp

Index: Source/web/ChromeClientImpl.cpp
diff --git a/Source/web/ChromeClientImpl.cpp b/Source/web/ChromeClientImpl.cpp
index fe36f0c5799ee616b80c4fcd6342cc471e144c6f..606a744527bbfdd7a3b14c839e06bbfea32cc572 100644
--- a/Source/web/ChromeClientImpl.cpp
+++ b/Source/web/ChromeClientImpl.cpp
@@ -107,6 +107,8 @@
 
 namespace blink {
 
+class WebCompositorAnimationTimeline;
+
 // Converts a AXObjectCache::AXNotification to a WebAXEvent
 static WebAXEvent toWebAXEvent(AXObjectCache::AXNotification notification)
 {
@@ -708,6 +710,44 @@ void ChromeClientImpl::attachRootGraphicsLayer(GraphicsLayer* rootLayer, LocalFr
     }
 }
 
+void ChromeClientImpl::attachCompositorAnimationTimeline(WebCompositorAnimationTimeline* compositorTimeline, LocalFrame* localRoot)
+{
+    // FIXME: For top-level frames we still use the WebView as a WebWidget. This special
+    // case will be removed when top-level frames get WebFrameWidgets.
+    if (localRoot->isMainFrame()) {
+        m_webView->attachCompositorAnimationTimeline(compositorTimeline);
+    } else {
+        WebLocalFrameImpl* webFrame = WebLocalFrameImpl::fromFrame(localRoot);
+        // FIXME: The following conditional is only needed for staging until the Chromium patch
+        // lands that instantiates a WebFrameWidget.
+        if (!webFrame->frameWidget()) {
+            m_webView->attachCompositorAnimationTimeline(compositorTimeline);
+            return;
+        }
+        ASSERT(webFrame && webFrame->frameWidget());
+        webFrame->frameWidget()->attachCompositorAnimationTimeline(compositorTimeline);
+    }
+}
+
+void ChromeClientImpl::detachCompositorAnimationTimeline(WebCompositorAnimationTimeline* compositorTimeline, LocalFrame* localRoot)
+{
+    // FIXME: For top-level frames we still use the WebView as a WebWidget. This special
+    // case will be removed when top-level frames get WebFrameWidgets.
+    if (localRoot->isMainFrame()) {
+        m_webView->detachCompositorAnimationTimeline(compositorTimeline);
+    } else {
+        WebLocalFrameImpl* webFrame = WebLocalFrameImpl::fromFrame(localRoot);
+        // FIXME: The following conditional is only needed for staging until the Chromium patch
+        // lands that instantiates a WebFrameWidget.
+        if (!webFrame->frameWidget()) {
+            m_webView->detachCompositorAnimationTimeline(compositorTimeline);
+            return;
+        }
+        ASSERT(webFrame && webFrame->frameWidget());
+        webFrame->frameWidget()->detachCompositorAnimationTimeline(compositorTimeline);
+    }
+}
+
 void ChromeClientImpl::enterFullScreenForElement(Element* element)
 {
     m_webView->enterFullScreenForElement(element);