Browser Plugin: Implement BrowserPluginObserver.

content/renderer/browser_plugin/browser_plugin_impl.h

Index: content/renderer/browser_plugin/browser_plugin_impl.h
diff --git a/content/renderer/browser_plugin/browser_plugin.h b/content/renderer/browser_plugin/browser_plugin_impl.h
similarity index 87%
rename from content/renderer/browser_plugin/browser_plugin.h
rename to content/renderer/browser_plugin/browser_plugin_impl.h
index 14ea94980377ea2fb35fd82578198be17797745c..a0973445bc987a122c9aff0615ecf6a527f390ac 100644
--- a/content/renderer/browser_plugin/browser_plugin.h
+++ b/content/renderer/browser_plugin/browser_plugin_impl.h
@@ -2,23 +2,24 @@
 // 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_H_
-#define  CONTENT_RENDERER_BROWSER_PLUGIN_BROWSER_PLUGIN_H_
-
-#include "third_party/WebKit/Source/WebKit/chromium/public/WebPlugin.h"
+#ifndef  CONTENT_RENDERER_BROWSER_PLUGIN_BROWSER_PLUGIN_IMPL_H_
+#define  CONTENT_RENDERER_BROWSER_PLUGIN_BROWSER_PLUGIN_IMPL_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
+#include "base/observer_list.h"
 #include "base/process_util.h"
 #include "base/sequenced_task_runner_helpers.h"
 #if defined(OS_WIN)
 #include "base/shared_memory.h"
 #endif
 #include "content/common/browser_plugin_message_enums.h"
+#include "content/public/renderer/browser_plugin/browser_plugin.h"
 #include "content/renderer/browser_plugin/browser_plugin_backing_store.h"
 #include "content/renderer/browser_plugin/browser_plugin_bindings.h"
 #include "content/renderer/render_view_impl.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebDragStatus.h"
+#include "third_party/WebKit/Source/WebKit/chromium/public/WebPlugin.h"
 
 struct BrowserPluginHostMsg_AutoSize_Params;
 struct BrowserPluginHostMsg_ResizeGuest_Params;
@@ -29,27 +30,18 @@ namespace content {
 
 class BrowserPluginCompositingHelper;
 class BrowserPluginManager;
+class BrowserPluginObserver;
 class MockBrowserPlugin;
 
-class CONTENT_EXPORT BrowserPlugin :
-    NON_EXPORTED_BASE(public WebKit::WebPlugin) {
+class CONTENT_EXPORT BrowserPluginImpl :
+    NON_EXPORTED_BASE(public WebKit::WebPlugin),
+    public BrowserPlugin {
  public:
   RenderViewImpl* render_view() const { return render_view_.get(); }
   int render_view_routing_id() const { return render_view_routing_id_; }
 
   bool OnMessageReceived(const IPC::Message& msg);
 
-  // Update Browser Plugin's DOM Node attribute |attribute_name| with the value
-  // |attribute_value|.
-  void UpdateDOMAttribute(const std::string& attribute_name,
-                          const std::string& attribute_value);
-  // Remove the DOM Node attribute with the name |attribute_name|.
-  void RemoveDOMAttribute(const std::string& attribute_name);
-  // Get Browser Plugin's DOM Node attribute |attribute_name|'s value.
-  std::string GetDOMAttributeValue(const std::string& attribute_name) const;
-  // Checks if the attribute |attribute_name| exists in the DOM.
-  bool HasDOMAttribute(const std::string& attribute_name) const;
-
   // Get the name attribute value.
   std::string GetNameAttribute() const;
   // Parse the name attribute value.
@@ -139,6 +131,28 @@ class CONTENT_EXPORT BrowserPlugin :
   void OnEmbedderDecidedPermission(int request_id, bool allow);
 
 
+  // BrowserPlugin implementation.
+  virtual RenderView* GetRenderView() const OVERRIDE;
+  virtual WebKit::WebPluginContainer* GetContainer() const OVERRIDE;
+  virtual void AddMethodBinding(
+      BrowserPluginMethodBinding* method_binding) OVERRIDE;
+  virtual void AddPropertyBinding(
+      BrowserPluginPropertyBinding* method_binding) OVERRIDE;
+  virtual void TriggerEvent(
+      const std::string& event_name,
+      std::map<std::string, base::Value*>* props) OVERRIDE;
+  virtual void UpdateDOMAttribute(const std::string& attribute_name,
+                                  const std::string& attribute_value) OVERRIDE;
+  virtual void RemoveDOMAttribute(const std::string& attribute_name) OVERRIDE;
+  virtual std::string GetDOMAttributeValue(
+      const std::string& attribute_name) const OVERRIDE;
+  virtual bool HasDOMAttribute(
+      const std::string& attribute_name) const OVERRIDE;
+  virtual bool HasNavigated() const OVERRIDE;
+
+  // IPC::Sender implementation.
+  virtual bool Send(IPC::Message* message) OVERRIDE;
+
   // WebKit::WebPlugin implementation.
   virtual WebKit::WebPluginContainer* container() const OVERRIDE;
   virtual bool initialize(WebKit::WebPluginContainer* container) OVERRIDE;
@@ -178,26 +192,32 @@ class CONTENT_EXPORT BrowserPlugin :
       void* notify_data,
       const WebKit::WebURLError& error) OVERRIDE;
  private:
-  friend class base::DeleteHelper<BrowserPlugin>;
+  friend class base::DeleteHelper<BrowserPluginImpl>;
   // Only the manager is allowed to create a BrowserPlugin.
   friend class BrowserPluginManagerImpl;
+  friend class BrowserPluginObserver;
   friend class MockBrowserPluginManager;
 
   // For unit/integration tests.
   friend class MockBrowserPlugin;
 
-  // A BrowserPlugin object is a controller that represents an instance of a
+  // A BrowserPluginImpl object is a controller that represents an instance of a
   // browser plugin within the embedder renderer process. Each BrowserPlugin
-  // within a process has a unique instance_id that is used to route messages
+  // within a process has a unique |instance_id| that is used to route messages
   // to it. It takes in a RenderViewImpl that it's associated with along
   // with the frame within which it lives and the initial attributes assigned
   // to it on creation.
-  BrowserPlugin(
+  BrowserPluginImpl(
       RenderViewImpl* render_view,
       WebKit::WebFrame* frame,
       const WebKit::WebPluginParams& params);
 
-  virtual ~BrowserPlugin();
+  virtual ~BrowserPluginImpl();
+
+  // Add and remove observers for filtering IPC messages. Clients must be sure
+  // to remove the observer before they go away.
+  void AddObserver(BrowserPluginObserver* observer);
+  void RemoveObserver(BrowserPluginObserver* observer);
 
   int width() const { return plugin_rect_.width(); }
   int height() const { return plugin_rect_.height(); }
@@ -221,11 +241,6 @@ class CONTENT_EXPORT BrowserPlugin :
   // and sets them appropriately.
   void ParseAttributes();
 
-  // Triggers the event-listeners for |event_name|. Note that the function
-  // frees all the values in |props|.
-  void TriggerEvent(const std::string& event_name,
-                    std::map<std::string, base::Value*>* props);
-
   // Creates and maps a shared damage buffer.
   virtual base::SharedMemory* CreateDamageBuffer(
       const size_t size,
@@ -299,6 +314,7 @@ class CONTENT_EXPORT BrowserPlugin :
                         std::string mailbox_name,
                         int gpu_route_id,
                         int gpu_host_id);
+  void OnForwardMessage(int instance_id, const IPC::Message& msg);
   void OnGuestContentWindowReady(int instance_id,
                                  int content_window_routing_id);
   void OnGuestGone(int instance_id, int process_id, int status);
@@ -371,7 +387,7 @@ class CONTENT_EXPORT BrowserPlugin :
       PendingPermissionRequests;
   PendingPermissionRequests pending_permission_requests_;
 
-  typedef std::pair<int, base::WeakPtr<BrowserPlugin> >
+  typedef std::pair<int, base::WeakPtr<BrowserPluginImpl> >
       AliveV8PermissionRequestItem;
   std::map<int, AliveV8PermissionRequestItem*>
       alive_v8_permission_request_objects_;
@@ -381,6 +397,9 @@ class CONTENT_EXPORT BrowserPlugin :
   // avoid accessing the RenderViewImpl.
   scoped_refptr<BrowserPluginManager> browser_plugin_manager_;
 
+  // A list of observers that filter messages. Weak references.
+  ObserverList<BrowserPluginObserver> observers_;
+
   // Important: Do not add more history state here.
   // We strongly discourage storing additional history state (such as page IDs)
   // in the embedder process, at the risk of having incorrect information that
@@ -400,11 +419,11 @@ class CONTENT_EXPORT BrowserPlugin :
 
   // Weak factory used in v8 |MakeWeak| callback, since the v8 callback might
   // get called after BrowserPlugin has been destroyed.
-  base::WeakPtrFactory<BrowserPlugin> weak_ptr_factory_;
+  base::WeakPtrFactory<BrowserPluginImpl> weak_ptr_factory_;
 
-  DISALLOW_COPY_AND_ASSIGN(BrowserPlugin);
+  DISALLOW_COPY_AND_ASSIGN(BrowserPluginImpl);
 };
 
 }  // namespace content
 
-#endif  // CONTENT_RENDERER_BROWSER_PLUGIN_BROWSER_PLUGIN_H_
+#endif  // CONTENT_RENDERER_BROWSER_PLUGIN_BROWSER_PLUGIN_IMPL_H_