Browser Plugin: Implement BrowserPluginObserver.

content/public/renderer/browser_plugin/browser_plugin_observer.cc

+// 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.
+
+#include "content/public/renderer/browser_plugin/browser_plugin_observer.h"
+
+#include "content/public/renderer/browser_plugin/browser_plugin.h"
+#include "content/renderer/browser_plugin/browser_plugin_impl.h"
+#include "ipc/ipc_message.h"
+
+namespace content {
+
+BrowserPluginObserver::BrowserPluginObserver(BrowserPlugin* browser_plugin)
+    : browser_plugin_(browser_plugin) {
+  CHECK(browser_plugin);
+  BrowserPluginImpl* impl = static_cast<BrowserPluginImpl*>(browser_plugin);
+  impl->AddObserver(this);
+}
+
+BrowserPluginObserver::~BrowserPluginObserver() {
+  if (browser_plugin_) {
+    BrowserPluginImpl* impl = static_cast<BrowserPluginImpl*>(browser_plugin_);
+    impl->RemoveObserver(this);
+  }
+}
+
+void BrowserPluginObserver::OnDestruct() {
+  delete this;
+}
+
+bool BrowserPluginObserver::OnMessageReceived(const IPC::Message& message) {
+  return false;
+}
+
+bool BrowserPluginObserver::Send(IPC::Message* message) {
+  if (browser_plugin_)
+    return browser_plugin_->Send(message);
+
+  delete message;
+  return false;
+}
+
+BrowserPlugin* BrowserPluginObserver::browser_plugin() const {
+  return browser_plugin_;
+}
+
+void BrowserPluginObserver::BrowserPluginGone() {
+  browser_plugin_ = NULL;
+}
+
+}  // namespace content