Make scrollAnimatorEnabled work on Mac like it does on other platforms

content/browser/renderer_host/render_view_host_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/browser/renderer_host/render_view_host_impl.h"
 
 #include <set>
 #include <string>
 #include <utility>
 #include <vector>
@@ skipping 462 matching lines @@
   prefs.device_supports_mouse = false;
 #endif
 
   prefs.pointer_events_max_touch_points = ui::MaxTouchPoints();
 
   prefs.touch_adjustment_enabled =
       !command_line.HasSwitch(switches::kDisableTouchAdjustment);
 
   prefs.enable_scroll_animator =
       !command_line.HasSwitch(switches::kDisableSmoothScrolling) &&
-      gfx::Animation::ShouldRenderRichAnimation();
+      gfx::Animation::ScrollAnimationsEnabledBySystem();
 
   // Certain GPU features might have been blacklisted.
   GpuDataManagerImpl::GetInstance()->UpdateRendererWebPrefs(&prefs);
 
   if (ChildProcessSecurityPolicyImpl::GetInstance()->HasWebUIBindings(
           GetProcess()->GetID())) {
     prefs.loads_images_automatically = true;
     prefs.javascript_enabled = true;
   }
 
@@ skipping 873 matching lines @@
 
 gfx::Point RenderViewHostImpl::ConvertDIPToViewport(const gfx::Point& point) {
   // The point in guest view is already converted.
   if (!render_widget_host_->scale_input_to_viewport())
     return point;
   float scale = GetWidget()->GetView()->current_device_scale_factor();
   return gfx::Point(point.x() * scale, point.y() * scale);
 }
 
 }  // namespace content