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

content/renderer/render_view_impl.h

Index: content/renderer/render_view_impl.h
diff --git a/content/renderer/render_view_impl.h b/content/renderer/render_view_impl.h
index b8df750c79cebea59de56344927ca435ab6c7deb..d508b9f89af40d81acec51d2b871d924b4eca29a 100644
--- a/content/renderer/render_view_impl.h
+++ b/content/renderer/render_view_impl.h
@@ -258,10 +258,12 @@
     pepper_last_mouse_event_target_ = plugin;
   }
 
-#if defined(OS_MACOSX)
+#if defined(OS_MACOSX) || defined(OS_WIN)
   // Informs the render view that the given plugin has gained or lost focus.
   void PluginFocusChanged(bool focused, int plugin_id);
-
+#endif
+
+#if defined(OS_MACOSX)
   // Starts plugin IME.
   void StartPluginIme();
 #endif
@@ -940,6 +942,11 @@
   // location or tab focus and visibily. These are non-owning references.
   std::set<WebPluginDelegateProxy*> plugin_delegates_;
 
+#if defined(OS_WIN)
+  // The ID of the focused NPAPI plugin.
+  int focused_plugin_id_;
+#endif
+
 #if defined(ENABLE_PLUGINS)
   typedef std::set<PepperPluginInstanceImpl*> PepperPluginSet;
   PepperPluginSet active_pepper_instances_;