Revert of Move beforeunload hang timer duties to its own timer.

content/browser/renderer_host/render_widget_host_impl.h

 // Copyright (c) 2012 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_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_IMPL_H_
 #define CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_IMPL_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 535 matching lines @@
   // Called when we receive a notification indicating that the renderer process
   // is gone. This will reset our state so that our state will be consistent if
   // a new renderer is created.
   void RendererExited(base::TerminationStatus status, int exit_code);
 
   // Called from a RenderFrameHost when the text selection has changed.
   void SelectionChanged(const base::string16& text,
                         uint32_t offset,
                         const gfx::Range& range);
 
+  // Expose increment/decrement of the in-flight event count, so
+  // RenderViewHostImpl can account for in-flight beforeunload/unload events.
+  int increment_in_flight_event_count() { return ++in_flight_event_count_; }
+  int decrement_in_flight_event_count() {
+    DCHECK_GT(in_flight_event_count_, 0);
+    return --in_flight_event_count_;
+  }
+
   size_t in_flight_event_count() const { return in_flight_event_count_; }
   blink::WebInputEvent::Type hang_monitor_event_type() const {
     return hang_monitor_event_type_;
   }
   blink::WebInputEvent::Type last_event_type() const {
     return last_event_type_;
   }
 
   bool renderer_initialized() const { return renderer_initialized_; }
 
@@ skipping 337 matching lines @@
 #endif
 
   base::WeakPtrFactory<RenderWidgetHostImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderWidgetHostImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_IMPL_H_