Replace NPObject usage in ppapi with gin

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>
 #include <vector>
 
 #include "base/callback.h"
 #include "base/compiler_specific.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "base/strings/string16.h"
 #include "cc/layers/content_layer_client.h"
 #include "cc/layers/layer.h"
 #include "cc/layers/texture_layer_client.h"
 #include "content/common/content_export.h"
 #include "content/public/renderer/pepper_plugin_instance.h"
 #include "content/public/renderer/render_frame_observer.h"
 #include "content/renderer/mouse_lock_dispatcher.h"
+#include "gin/handle.h"
 #include "ppapi/c/dev/pp_cursor_type_dev.h"
 #include "ppapi/c/dev/ppp_printing_dev.h"
 #include "ppapi/c/dev/ppp_selection_dev.h"
 #include "ppapi/c/dev/ppp_text_input_dev.h"
 #include "ppapi/c/dev/ppp_zoom_dev.h"
 #include "ppapi/c/pp_completion_callback.h"
 #include "ppapi/c/pp_instance.h"
 #include "ppapi/c/pp_time.h"
 #include "ppapi/c/pp_var.h"
 #include "ppapi/c/ppb_audio_config.h"
@@ skipping 88 matching lines @@
   // Create and return a PepperPluginInstanceImpl object which supports the most
   // recent version of PPP_Instance possible by querying the given
   // get_plugin_interface function. If the plugin does not support any valid
   // PPP_Instance interface, returns NULL.
   static PepperPluginInstanceImpl* Create(RenderFrameImpl* render_frame,
                                           PluginModule* module,
                                           blink::WebPluginContainer* container,
                                           const GURL& plugin_url);
   RenderFrameImpl* render_frame() const { return render_frame_; }
   PluginModule* module() const { return module_.get(); }
-  MessageChannel& message_channel() { return *message_channel_; }
 
   blink::WebPluginContainer* container() const { return container_; }
 
   // Returns the PP_Instance uniquely identifying this instance. Guaranteed
   // nonzero.
   PP_Instance pp_instance() const { return pp_instance_; }
 
   ppapi::thunk::ResourceCreationAPI& resource_creation() {
     return *resource_creation_.get();
   }
 
+  MessageChannel* message_channel() { return message_channel_; }
+  v8::Local<v8::Object> GetMessageChannelObject();
+  // Called when |message_channel_| is destroyed as it may be destroyed prior to
+  // the plugin being destroyed.
+  void MessageChannelDestroyed();
+
   // Return the v8 context that the plugin is in.
   v8::Local<v8::Context> GetContext();
 
   // 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.
@@ skipping 26 matching lines @@
   bool full_frame() const { return full_frame_; }
   const ppapi::ViewData& view_data() const { return view_data_; }
 
   // PPP_Instance and PPP_Instance_Private.
   bool Initialize(const std::vector<std::string>& arg_names,
                   const std::vector<std::string>& arg_values,
                   bool full_frame);
   bool HandleDocumentLoad(const blink::WebURLResponse& response);
   bool HandleInputEvent(const blink::WebInputEvent& event,
                         blink::WebCursorInfo* cursor_info);
-  PP_Var GetInstanceObject();
+  PP_Var GetInstanceObject(v8::Isolate* isolate);
   void ViewChanged(const gfx::Rect& position,
                    const gfx::Rect& clip,
                    const std::vector<gfx::Rect>& cut_outs_rects);
 
   // Handlers for composition events.
   bool HandleCompositionStart(const base::string16& text);
   bool HandleCompositionUpdate(
       const base::string16& text,
       const std::vector<blink::WebCompositionUnderline>& underlines,
       int selection_start,
@@ skipping 308 matching lines @@
   // external out-of-process instance.
   PP_ExternalPluginResult ResetAsProxied(scoped_refptr<PluginModule> module);
 
   // Checks whether this is a valid instance of the given module. After calling
   // ResetAsProxied above, a NaCl plugin instance's module changes, so external
   // hosts won't recognize it as a valid instance of the original module. This
   // method fixes that be checking that either module_ or original_module_ match
   // the given module.
   bool IsValidInstanceOf(PluginModule* module);
 
-  // Returns the plugin NPP identifier that this plugin will use to identify
-  // itself when making NPObject scripting calls to WebBindings.
-  struct _NPP* instanceNPP();
-
   // cc::TextureLayerClient implementation.
   virtual bool PrepareTextureMailbox(
       cc::TextureMailbox* mailbox,
       scoped_ptr<cc::SingleReleaseCallback>* release_callback,
       bool use_shared_memory) OVERRIDE;
 
   // RenderFrameObserver
   virtual void OnDestruct() OVERRIDE;
 
   void AddLatencyInfo(const std::vector<ui::LatencyInfo>& latency_info);
@@ skipping 288 matching lines @@
   // this here by modifying the various plugin attributes and then restoring
   // them on exit.
   blink::WebString width_before_fullscreen_;
   blink::WebString height_before_fullscreen_;
   blink::WebString border_before_fullscreen_;
   blink::WebString style_before_fullscreen_;
   gfx::Size screen_size_for_fullscreen_;
 
   // The MessageChannel used to implement bidirectional postMessage for the
   // instance.
-  scoped_ptr<MessageChannel> message_channel_;
+  v8::Persistent<v8::Object> message_channel_object_;
+
+  // A pointer to the MessageChannel underlying |message_channel_object_|. It is
+  // only valid as long as |message_channel_object_| is alive.
+  MessageChannel* message_channel_;
 
   // Bitmap for crashed plugin. Lazily initialized, non-owning pointer.
   SkBitmap* sad_plugin_;
 
   typedef std::set<PluginObject*> PluginObjectSet;
   PluginObjectSet live_plugin_objects_;
 
   // Classes of events that the plugin has registered for, both for filtering
   // and not. The bits are PP_INPUTEVENT_CLASS_*.
   uint32_t input_event_mask_;
@@ skipping 29 matching lines @@
   scoped_ptr<ExternalDocumentLoader> external_document_loader_;
   bool external_document_load_;
 
   // The ContentDecryptorDelegate forwards PPP_ContentDecryptor_Private
   // calls and handles PPB_ContentDecryptor_Private calls.
   scoped_ptr<ContentDecryptorDelegate> content_decryptor_delegate_;
 
   // The link currently under the cursor.
   base::string16 link_under_cursor_;
 
-  // 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_;
 
   // The text that is currently selected in the plugin.
   base::string16 selected_text_;
@@ skipping 10 matching lines @@
   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_