Revert of Remove a bunch of NPAPI quirks and related support code

content/child/npapi/webplugin.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_CHILD_NPAPI_WEBPLUGIN_H_
 #define CONTENT_CHILD_NPAPI_WEBPLUGIN_H_
 
 #include <stdint.h>
 
 #include <string>
@@ skipping 48 matching lines @@
 
   // Cancels document load.
   virtual void CancelDocumentLoad() = 0;
 
   virtual void DidStartLoading() = 0;
   virtual void DidStopLoading() = 0;
 
   // Returns true iff in incognito mode.
   virtual bool IsOffTheRecord() = 0;
 
+#if defined(OS_WIN)
+  // |pump_messages_event| is a event handle which is used in NPP_HandleEvent
+  // calls to pump messages if the plugin enters a modal loop.
+  // |dummy_activation_window} is used to ensure correct keyboard activation.
+  // It needs to be a child of the parent window.
+  virtual void SetWindowlessData(HANDLE pump_messages_event,
+                                 gfx::NativeViewId dummy_activation_window) = 0;
+#endif
+
 #if defined(OS_MACOSX)
   // Called to inform the WebPlugin that the plugin has gained or lost focus.
   virtual void FocusChanged(bool focused) {}
 
   // Starts plugin IME.
   virtual void StartIme() {}
 
   // Returns the accelerated surface abstraction for accelerated plugins.
   virtual WebPluginAcceleratedSurface* GetAcceleratedSurface(
       gfx::GpuPreference gpu_preference) = 0;
 
   // Core Animation plugin support. CA plugins always render through
   // the compositor.
   virtual void AcceleratedPluginEnabledRendering() = 0;
   virtual void AcceleratedPluginAllocatedIOSurface(int32_t width,
                                                    int32_t height,
                                                    uint32_t surface_id) = 0;
   virtual void AcceleratedPluginSwappedIOSurface() = 0;
 #endif
 };
 
 }  // namespace content
 
 #endif  // CONTENT_CHILD_NPAPI_WEBPLUGIN_H_