Move compositor InputHandler from RenderViewImpl to RenderWidget.

content/renderer/render_thread_impl.cc

Index: content/renderer/render_thread_impl.cc
diff --git a/content/renderer/render_thread_impl.cc b/content/renderer/render_thread_impl.cc
index b397ca1c56edebe3f8d7c122278f7c2ef4e28c77..83771b0256873bc9bf6939fa22dd06a65b0567da 100644
--- a/content/renderer/render_thread_impl.cc
+++ b/content/renderer/render_thread_impl.cc
@@ -623,6 +623,7 @@ RenderThreadImpl::RenderThreadImpl(
       renderer_scheduler_(std::move(scheduler)),
       main_message_loop_(std::move(main_message_loop)),
       categorized_worker_pool_(new CategorizedWorkerPool()),
+      is_scroll_animator_enabled_(false),
       renderer_binding_(this) {
   scoped_refptr<base::SingleThreadTaskRunner> test_task_counter;
   DCHECK(base::CommandLine::ForCurrentProcess()->HasSwitch(
@@ -1713,6 +1714,10 @@ bool RenderThreadImpl::IsThreadedAnimationEnabled() {
   return is_threaded_animation_enabled_;
 }
 
+bool RenderThreadImpl::IsScrollAnimatorEnabled() {
+  return is_scroll_animator_enabled_;
+}
+
 void RenderThreadImpl::OnRAILModeChanged(v8::RAILMode rail_mode) {
   blink::mainThreadIsolate()->SetRAILMode(rail_mode);
   blink::setRAILModeOnWorkerThreadIsolates(rail_mode);
@@ -2114,6 +2119,7 @@ gpu::GpuChannelHost* RenderThreadImpl::GetGpuChannel() {
 
 void RenderThreadImpl::CreateView(mojom::CreateViewParamsPtr params) {
   CompositorDependencies* compositor_deps = this;
+  is_scroll_animator_enabled_ = params->web_preferences.enable_scroll_animator;
   // When bringing in render_view, also bring in webkit's glue and jsbindings.
   RenderViewImpl::Create(compositor_deps, *params,
                          RenderWidget::ShowCallback());