Introducing WebCoalescedInputEvent and inclusion in content/common

content/renderer/input/main_thread_event_queue.h

Index: content/renderer/input/main_thread_event_queue.h
diff --git a/content/renderer/input/main_thread_event_queue.h b/content/renderer/input/main_thread_event_queue.h
index daa73d96b38eeb27ea1830ef8e58068f4703b13d..8762fa5c2cb0fa0054c2505e1b01776ace770945 100644
--- a/content/renderer/input/main_thread_event_queue.h
+++ b/content/renderer/input/main_thread_event_queue.h
@@ -22,7 +22,7 @@ namespace content {
 
 class EventWithDispatchType : public ScopedWebInputEventWithLatencyInfo {
  public:
-  EventWithDispatchType(ui::ScopedWebInputEvent event,
+  EventWithDispatchType(blink::WebScopedInputEvent event,
                         const ui::LatencyInfo& latency,
                         InputEventDispatchType dispatch_type);
   ~EventWithDispatchType();
@@ -120,7 +120,7 @@ class CONTENT_EXPORT MainThreadEventQueue
 
   // Called once the compositor has handled |event| and indicated that it is
   // a non-blocking event to be queued to the main thread.
-  bool HandleEvent(ui::ScopedWebInputEvent event,
+  bool HandleEvent(blink::WebScopedInputEvent event,
                    const ui::LatencyInfo& latency,
                    InputEventDispatchType dispatch_type,
                    InputEventAckState ack_result);