Pepper: Tighten GetLiveModule in PluginRegistry.

content/renderer/pepper/pepper_plugin_instance_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_RENDERER_PEPPER_PEPPER_PLUGIN_INSTANCE_IMPL_H_
 #define CONTENT_RENDERER_PEPPER_PEPPER_PLUGIN_INSTANCE_IMPL_H_
 
 #include <list>
 #include <set>
 #include <string>
@@ skipping 128 matching lines @@
   ppapi::thunk::ResourceCreationAPI& resource_creation() {
     return *resource_creation_.get();
   }
 
   // Does some pre-destructor cleanup on the instance. This is necessary
   // because some cleanup depends on the plugin instance still existing (like
   // calling the plugin's DidDestroy function). This function is called from
   // the WebPlugin implementation when WebKit is about to remove the plugin.
   void Delete();
 
+  // Returns true if Delete() has been called on this object.
+  bool is_deleted() const;
+
   // Paints the current backing store to the web page.
   void Paint(blink::WebCanvas* canvas,
              const gfx::Rect& plugin_rect,
              const gfx::Rect& paint_rect);
 
   // Schedules a paint of the page for the given region. The coordinates are
   // relative to the top-left of the plugin. This does nothing if the plugin
   // has not yet been positioned. You can supply an empty gfx::Rect() to
   // invalidate the entire plugin.
   void InvalidateRect(const gfx::Rect& rect);
@@ skipping 681 matching lines @@
   // Dummy NPP value used when calling in to WebBindings, to allow the bindings
   // to correctly track NPObjects belonging to this plugin instance.
   scoped_ptr<struct _NPP> npp_;
 
   // We store the isolate at construction so that we can be sure to use the
   // Isolate in which this Instance was created when interacting with v8.
   v8::Isolate* isolate_;
 
   scoped_ptr<MouseLockDispatcher::LockTarget> lock_target_;
 
+  bool is_deleted_;
+
   // We use a weak ptr factory for scheduling DidChangeView events so that we
   // can tell whether updates are pending and consolidate them. When there's
   // already a weak ptr pending (HasWeakPtrs is true), code should update the
   // view_data_ but not send updates. This also allows us to cancel scheduled
   // view change events.
   base::WeakPtrFactory<PepperPluginInstanceImpl> view_change_weak_ptr_factory_;
   base::WeakPtrFactory<PepperPluginInstanceImpl> weak_factory_;
 
   friend class PpapiPluginInstanceTest;
   DISALLOW_COPY_AND_ASSIGN(PepperPluginInstanceImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_PEPPER_PEPPER_PLUGIN_INSTANCE_IMPL_H_