Move compositor InputHandler from RenderViewImpl to RenderWidget.

content/renderer/render_thread_impl.h

Index: content/renderer/render_thread_impl.h
diff --git a/content/renderer/render_thread_impl.h b/content/renderer/render_thread_impl.h
index 43b0b853a45f49af3d62d4331e8a12005b4478a4..76f0813a7499ad3f469310679a2a7335e4641ad4 100644
--- a/content/renderer/render_thread_impl.h
+++ b/content/renderer/render_thread_impl.h
@@ -236,6 +236,7 @@ class CONTENT_EXPORT RenderThreadImpl
   cc::TaskGraphRunner* GetTaskGraphRunner() override;
   bool AreImageDecodeTasksEnabled() override;
   bool IsThreadedAnimationEnabled() override;
+  bool IsScrollAnimatorEnabled() override;
 
   // blink::scheduler::RendererScheduler::RAILModeObserver implementation.
   void OnRAILModeChanged(v8::RAILMode rail_mode) override;
@@ -725,6 +726,7 @@ class CONTENT_EXPORT RenderThreadImpl
   cc::BufferToTextureTargetMap buffer_to_texture_target_map_;
   bool are_image_decode_tasks_enabled_;
   bool is_threaded_animation_enabled_;
+  bool is_scroll_animator_enabled_;
 
   class PendingFrameCreate : public base::RefCounted<PendingFrameCreate> {
    public: