Implement active wheel fling transfer via WebCompositorInputHandlerClient

content/renderer/render_view_impl.cc

Index: content/renderer/render_view_impl.cc
diff --git a/content/renderer/render_view_impl.cc b/content/renderer/render_view_impl.cc
index 70f11bda9b3b92550ea01519e6380e66d7d04345..23964222292ab62dba2dd13161fdf56d166f075e 100644
--- a/content/renderer/render_view_impl.cc
+++ b/content/renderer/render_view_impl.cc
@@ -719,6 +719,12 @@ bool RenderViewImpl::GetPluginInfo(const GURL& url,
   return found;
 }
 
+void RenderViewImpl::TransferActiveWheelFlingAnimation(
+    const WebKit::WebActiveWheelFlingParameters& params) {
+  if (webview())
+    webview()->transferActiveWheelFlingAnimation(params);
+}
+
 bool RenderViewImpl::OnMessageReceived(const IPC::Message& message) {
   WebFrame* main_frame = webview() ? webview()->mainFrame() : NULL;
   if (main_frame)
@@ -2070,6 +2076,16 @@ bool RenderViewImpl::isPointerLocked() {
       webwidget_mouse_lock_target_.get());
 }
 
+void RenderViewImpl::didActivateCompositor(int input_handler_identifier) {
+  CompositorThread* compositor_thread =
+      RenderThreadImpl::current()->compositor_thread();
+  if (compositor_thread)
+    compositor_thread->AddInputHandler(
+        routing_id_, input_handler_identifier, AsWeakPtr());
+
+  RenderWidget::didActivateCompositor(input_handler_identifier);
+}
+
 // WebKit::WebFrameClient -----------------------------------------------------
 
 WebPlugin* RenderViewImpl::createPlugin(WebFrame* frame,