Introducing WebCoalescedInputEvent and inclusion in content/common

content/renderer/input/input_handler_manager.h

Index: content/renderer/input/input_handler_manager.h
diff --git a/content/renderer/input/input_handler_manager.h b/content/renderer/input/input_handler_manager.h
index 3e92b92581077433ee16e233ee54aef02ce51f7d..4d936fdf47f840a46bc347ecc6c7567ad8e315c1 100644
--- a/content/renderer/input/input_handler_manager.h
+++ b/content/renderer/input/input_handler_manager.h
@@ -83,12 +83,12 @@ class CONTENT_EXPORT InputHandlerManager {
 
   using InputEventAckStateCallback =
       base::Callback<void(InputEventAckState,
-                          ui::ScopedWebInputEvent,
+                          blink::WebScopedInputEvent,
                           const ui::LatencyInfo&,
                           std::unique_ptr<ui::DidOverscrollParams>)>;
   // Called from the compositor's thread.
   virtual void HandleInputEvent(int routing_id,
-                                ui::ScopedWebInputEvent input_event,
+                                blink::WebScopedInputEvent input_event,
                                 const ui::LatencyInfo& latency_info,
                                 const InputEventAckStateCallback& callback);
 
@@ -107,7 +107,7 @@ class CONTENT_EXPORT InputHandlerManager {
   // Called from the compositor's thread.
   void DispatchNonBlockingEventToMainThread(
       int routing_id,
-      ui::ScopedWebInputEvent event,
+      blink::WebScopedInputEvent event,
       const ui::LatencyInfo& latency_info);
 
  private:
@@ -135,7 +135,7 @@ class CONTENT_EXPORT InputHandlerManager {
   void DidHandleInputEventAndOverscroll(
       const InputEventAckStateCallback& callback,
       ui::InputHandlerProxy::EventDisposition event_disposition,
-      ui::ScopedWebInputEvent input_event,
+      blink::WebScopedInputEvent input_event,
       const ui::LatencyInfo& latency_info,
       std::unique_ptr<ui::DidOverscrollParams> overscroll_params);