Smooth scroll on Windows should respect OS level animation disabling

content/renderer/render_view_impl.cc

 // Copyright (c) 2012 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.
 
 #include "content/renderer/render_view_impl.h"
 
 #include <algorithm>
 #include <cmath>
 
 #include "base/auto_reset.h"
@@ skipping 2119 matching lines @@
   // (SnowLeopard, which has Aqua scrollbars which need synchronous updates).
   use_threaded_event_handling = compositor_deps_->IsElasticOverscrollEnabled();
 #endif
   if (use_threaded_event_handling) {
     RenderThreadImpl* render_thread = RenderThreadImpl::current();
     // render_thread may be NULL in tests.
     InputHandlerManager* input_handler_manager =
         render_thread ? render_thread->input_handler_manager() : NULL;
     if (input_handler_manager) {
       input_handler_manager->AddInputHandler(
-          routing_id_, rwc->GetInputHandler(), AsWeakPtr());
+          routing_id_, rwc->GetInputHandler(), AsWeakPtr(),
+          !webkit_preferences_.enable_scroll_animator);
     }
   }
 }
 
 // blink::WebFrameClient -----------------------------------------------------
 
 void RenderViewImpl::Repaint(const gfx::Size& size) {
   OnRepaint(size);
 }
 
@@ skipping 1573 matching lines @@
   if (IsUseZoomForDSFEnabled()) {
     webview()->setZoomFactorForDeviceScaleFactor(device_scale_factor_);
   } else {
     webview()->setDeviceScaleFactor(device_scale_factor_);
   }
   webview()->settings()->setPreferCompositingToLCDTextEnabled(
       PreferCompositingToLCDText(compositor_deps_, device_scale_factor_));
 }
 
 }  // namespace content