Plumb smooth scrolling in Chromium compositor

content/child/blink_platform_impl.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_CHILD_BLINK_PLATFORM_IMPL_H_
 #define CONTENT_CHILD_BLINK_PLATFORM_IMPL_H_
 
 #include "base/compiler_specific.h"
 #include "base/containers/scoped_ptr_hash_map.h"
 #include "base/threading/thread_local_storage.h"
@@ skipping 144 matching lines @@
   virtual void suddenTerminationChanged(bool enabled) { }
   virtual double currentTime();
   virtual double monotonicallyIncreasingTime();
   virtual double systemTraceTime();
   virtual void cryptographicallyRandomValues(
       unsigned char* buffer, size_t length);
   virtual blink::WebGestureCurve* createFlingAnimationCurve(
       blink::WebGestureDevice device_source,
       const blink::WebFloatPoint& velocity,
       const blink::WebSize& cumulative_scroll);
+
+  virtual blink::WebGestureCurve* createSmoothScrollAnimationCurve(
+      blink::WebGestureDevice device_source,
+      float start_x,
+      float start_y,
+      float dx,
+      float dy,
+      int64_t duration);
+
   virtual void didStartWorkerRunLoop();
   virtual void didStopWorkerRunLoop();
   virtual blink::WebCrypto* crypto();
   virtual blink::WebGeofencingProvider* geofencingProvider();
   virtual blink::WebNotificationManager* notificationManager();
   virtual blink::WebPushProvider* pushProvider();
   virtual blink::WebServicePortProvider* createServicePortProvider(
       blink::WebServicePortProviderClient*);
   virtual blink::WebPermissionClient* permissionClient();
   virtual blink::WebSyncProvider* backgroundSyncProvider();
@@ skipping 22 matching lines @@
   scoped_refptr<ThreadSafeSender> thread_safe_sender_;
   scoped_refptr<NotificationDispatcher> notification_dispatcher_;
   scoped_refptr<PushDispatcher> push_dispatcher_;
   scoped_ptr<PermissionDispatcher> permission_client_;
   scoped_ptr<BackgroundSyncProvider> sync_provider_;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_CHILD_BLINK_PLATFORM_IMPL_H_