Revert of Remove enable/disable wheel gestures setting.

content/renderer/input/input_handler_manager.h

 // Copyright 2013 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.
 
 #ifndef CONTENT_RENDERER_INPUT_INPUT_HANDLER_MANAGER_H_
 #define CONTENT_RENDERER_INPUT_INPUT_HANDLER_MANAGER_H_
 
 #include "base/containers/scoped_ptr_hash_map.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
@@ skipping 38 matching lines @@
       const scoped_refptr<base::SingleThreadTaskRunner>& task_runner,
       InputHandlerManagerClient* client,
       SynchronousInputHandlerProxyClient* sync_handler_client,
       scheduler::RendererScheduler* renderer_scheduler);
   virtual ~InputHandlerManager();
 
   // Callable from the main thread only.
   void AddInputHandler(int routing_id,
                        const base::WeakPtr<cc::InputHandler>& input_handler,
                        const base::WeakPtr<RenderViewImpl>& render_view_impl,
-                       bool enable_smooth_scrolling);
+                       bool enable_smooth_scrolling,
+                       bool enable_wheel_gestures);
 
   void ObserveWheelEventAndResultOnMainThread(
       int routing_id,
       const blink::WebMouseWheelEvent& wheel_event,
       const cc::InputHandlerScrollResult& scroll_result);
 
   void ObserveGestureEventAndResultOnMainThread(
       int routing_id,
       const blink::WebGestureEvent& gesture_event,
       const cc::InputHandlerScrollResult& scroll_result);
@@ skipping 20 matching lines @@
   // Called from the compositor's thread.
   void DidAnimateForInput();
 
  private:
   // Called from the compositor's thread.
   void 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,
-      bool enable_smooth_scrolling);
+      bool enable_smooth_scrolling,
+      bool enable_wheel_gestures);
 
   void ObserveWheelEventAndResultOnCompositorThread(
       int routing_id,
       const blink::WebMouseWheelEvent& wheel_event,
       const cc::InputHandlerScrollResult& scroll_result);
 
   void ObserveGestureEventAndResultOnCompositorThread(
       int routing_id,
       const blink::WebGestureEvent& gesture_event,
       const cc::InputHandlerScrollResult& scroll_result);
 
   void NotifyInputEventHandledOnCompositorThread(int routing_id,
                                                  blink::WebInputEvent::Type);
 
   typedef base::ScopedPtrHashMap<int,  // routing_id
                                  std::unique_ptr<InputHandlerWrapper>>
       InputHandlerMap;
   InputHandlerMap input_handlers_;
 
   const scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
   InputHandlerManagerClient* const client_;
   // May be null.
   SynchronousInputHandlerProxyClient* const synchronous_handler_proxy_client_;
   scheduler::RendererScheduler* const renderer_scheduler_;  // Not owned.
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_INPUT_INPUT_HANDLER_MANAGER_H_