Smooth scroll on Windows should respect OS level animation disabling

content/renderer/input/input_handler_manager.cc

Index: content/renderer/input/input_handler_manager.cc
diff --git a/content/renderer/input/input_handler_manager.cc b/content/renderer/input/input_handler_manager.cc
index 6ffc432e7321bf779d1cfa7d452e29977d70ee32..35ef3b467334d110476a60839acff8a87f27162a 100644
--- a/content/renderer/input/input_handler_manager.cc
+++ b/content/renderer/input/input_handler_manager.cc
@@ -62,18 +62,21 @@ InputHandlerManager::~InputHandlerManager() {
 void InputHandlerManager::AddInputHandler(
     int routing_id,
     const base::WeakPtr<cc::InputHandler>& input_handler,
-    const base::WeakPtr<RenderViewImpl>& render_view_impl) {
+    const base::WeakPtr<RenderViewImpl>& render_view_impl,
+    bool enable_smooth_scrolling) {
   if (task_runner_->BelongsToCurrentThread()) {
     AddInputHandlerOnCompositorThread(routing_id,
                                       base::ThreadTaskRunnerHandle::Get(),
-                                      input_handler, render_view_impl);
+                                      input_handler, render_view_impl,
+                                      enable_smooth_scrolling);
   } else {
     task_runner_->PostTask(
         FROM_HERE,
         base::Bind(&InputHandlerManager::AddInputHandlerOnCompositorThread,
                    base::Unretained(this), routing_id,
                    base::ThreadTaskRunnerHandle::Get(), input_handler,
-                   render_view_impl));
+                   render_view_impl,
+                   enable_smooth_scrolling));
   }
 }
 
@@ -81,7 +84,8 @@ void InputHandlerManager::AddInputHandlerOnCompositorThread(
     int routing_id,
     const scoped_refptr<base::SingleThreadTaskRunner>& main_task_runner,
     const base::WeakPtr<cc::InputHandler>& input_handler,
-    const base::WeakPtr<RenderViewImpl>& render_view_impl) {
+    const base::WeakPtr<RenderViewImpl>& render_view_impl,
+    bool enable_smooth_scrolling) {
   DCHECK(task_runner_->BelongsToCurrentThread());
 
   // The handler could be gone by this point if the compositor has shut down.
@@ -96,7 +100,8 @@ void InputHandlerManager::AddInputHandlerOnCompositorThread(
       "InputHandlerManager::AddInputHandlerOnCompositorThread",
       "result", "AddingRoute");
   scoped_ptr<InputHandlerWrapper> wrapper(new InputHandlerWrapper(
-      this, routing_id, main_task_runner, input_handler, render_view_impl));
+      this, routing_id, main_task_runner, input_handler, render_view_impl,
+      enable_smooth_scrolling));
   client_->DidAddInputHandler(routing_id, wrapper->input_handler_proxy());
   input_handlers_.add(routing_id, std::move(wrapper));
 }