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 d569350255fc98759f0de7ce89f7cd3374f98c42..78c999465bc8f5b466d0ad11404a2c0f0a0ad1e5 100644
--- a/content/renderer/render_thread_impl.cc
+++ b/content/renderer/render_thread_impl.cc
@@ -619,6 +619,7 @@ 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(
@@ -1687,6 +1688,10 @@ 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);
@@ -2120,6 +2125,7 @@ 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, false);
 }