Adds the renderer component of the Java Bridge

content/renderer/java_bridge_dispatcher.h

+// Copyright (c) 2011 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_JAVA_BRIDGE_DISPATCHER_H_
+#define CONTENT_RENDERER_JAVA_BRIDGE_DISPATCHER_H_
+
+#include "content/common/webkit_param_traits.h"  // For NPVariant_Param
+#include "content/public/renderer/render_view_observer.h"
+#include "ipc/ipc_channel_handle.h"
+
+class JavaBridgeChannel;
+
+// This class handles injecting Java objects into the main frame of a
+// RenderView. The 'add' and 'remove' messages received from the browser
+// process modify the entries in a map of 'pending' objects. These objects are
+// bound to the window object of the main frame when that window object is next
+// cleared. These objects remain bound until the window object is cleared
+// again.
+class JavaBridgeDispatcher : public content::RenderViewObserver {
+ public:
+  JavaBridgeDispatcher(content::RenderView* render_view,
+                       const IPC::ChannelHandle& channel_handle);
+  virtual ~JavaBridgeDispatcher();
+
+ private:
+  // RenderViewObserver override:
+  virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
+  virtual void DidClearWindowObject(WebKit::WebFrame* frame) OVERRIDE;
+
+  // Message handlers
+  void OnAddNamedObject(const string16& name,
+                        const NPVariant_Param& variant_param);
+  void OnRemoveNamedObject(const string16& name);
+
+  // Objects that will be bound to the window when the window object is next
+  // cleared. We hold a ref to these.
+  typedef std::map<string16, NPVariant> ObjectMap;
+  ObjectMap objects_;
+  scoped_ptr<JavaBridgeChannel> channel_;
+};
+
+#endif  // CONTENT_RENDERER_JAVA_BRIDGE_DISPATCHER_H_