Bubble scroll events from WebView guest to embedder.

content/renderer/browser_plugin/browser_plugin_manager.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_RENDERER_BROWSER_PLUGIN_BROWSER_PLUGIN_MANAGER_H_
 #define CONTENT_RENDERER_BROWSER_PLUGIN_BROWSER_PLUGIN_MANAGER_H_
 
 #include "base/id_map.h"
 #include "base/memory/weak_ptr.h"
 #include "content/public/renderer/render_process_observer.h"
 #include "ipc/ipc_sender.h"
 
 namespace blink {
 class WebFrame;
 }
 
+namespace IPC {
+class SyncChannel;
+}
+
 namespace content {
 
 class BrowserPlugin;
 class BrowserPluginDelegate;
 class RenderFrame;
+class GuestScrollCompletionFilter;
 
 // BrowserPluginManager manages the routing of messages to the appropriate
 // BrowserPlugin object based on its instance ID. There is one BrowserPlugin
 // for the RenderThread.
 class CONTENT_EXPORT BrowserPluginManager : public RenderProcessObserver {
  public:
   static BrowserPluginManager* Get();
 
   BrowserPluginManager();
   ~BrowserPluginManager() override;
 
+  // Creates and registers scroll completion filter.
+  void Init(scoped_refptr<base::SingleThreadTaskRunner> io_task_runner,
+            IPC::SyncChannel* channel);
+
   // Creates a new BrowserPlugin object.
   // BrowserPlugin is responsible for associating itself with the
   // BrowserPluginManager via AddBrowserPlugin. When it is destroyed, it is
   // responsible for removing its association via RemoveBrowserPlugin.
   // The |delegate| is expected to manage its own lifetime.
   // Generally BrowserPlugin calls DidDestroyElement() on the delegate and
   // right now the delegate destroys itself once it hears that callback.
   BrowserPlugin* CreateBrowserPlugin(
       RenderFrame* render_frame,
       const base::WeakPtr<BrowserPluginDelegate>& delegate);
 
   void Attach(int browser_plugin_instance_id);
 
   void Detach(int browser_plugin_instance_id);
 
   void AddBrowserPlugin(int browser_plugin_instance_id,
                         BrowserPlugin* browser_plugin);
   void RemoveBrowserPlugin(int browser_plugin_instance_id);
   BrowserPlugin* GetBrowserPlugin(int browser_plugin_instance_id) const;
 
   void UpdateFocusState();
 
   // Returns a new instance ID to be used by BrowserPlugin. Instance IDs are
   // unique per process.
   int GetNextInstanceID();
 
   void DidCommitCompositorFrame(int render_frame_routing_id);
   bool Send(IPC::Message* msg);
 
+  bool GetScrollHandledStatus();
+
   // RenderProcessObserver override.
   bool OnControlMessageReceived(const IPC::Message& message) override;
 
  private:
   // IPC message handlers.
   void OnCompositorFrameSwappedPluginUnavailable(const IPC::Message& message);
 
   // This map is keyed by guest instance IDs.
   IDMap<BrowserPlugin> instances_;
+  scoped_refptr<GuestScrollCompletionFilter> scroll_completion_filter_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserPluginManager);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_BROWSER_PLUGIN_BROWSER_PLUGIN_MANAGER_H_