1 files changed, 65 insertions, 0 deletions
diff --git a/content/public/browser/web_contents_observer.cc b/content/public/browser/web_contents_observer.cc
new file mode 100644
index 0000000..2ec882b
--- /dev/null
+++ b/content/public/browser/web_contents_observer.cc
@@ -0,0 +1,65 @@
+// 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.
+
+#include "content/public/browser/web_contents_observer.h"
+
+#include "content/browser/renderer_host/render_view_host.h"
+#include "content/browser/tab_contents/tab_contents.h"
+#include "content/public/browser/navigation_details.h"
+
+namespace content {
+
+WebContentsObserver::WebContentsObserver(TabContents* tab_contents)
+    : tab_contents_(NULL) {
+  Observe(tab_contents);
+}
+
+WebContentsObserver::WebContentsObserver()
+    : tab_contents_(NULL) {
+}
+
+WebContentsObserver::~WebContentsObserver() {
+  if (tab_contents_)
+    tab_contents_->RemoveObserver(this);
+}
+
+void WebContentsObserver::Observe(TabContents* tab_contents) {
+  if (tab_contents_)
+    tab_contents_->RemoveObserver(this);
+  tab_contents_ = tab_contents;
+  if (tab_contents_) {
+    tab_contents_->AddObserver(this);
+  }
+}
+
+bool WebContentsObserver::OnMessageReceived(const IPC::Message& message) {
+  return false;
+}
+
+bool WebContentsObserver::Send(IPC::Message* message) {
+  if (!tab_contents_ || !tab_contents_->GetRenderViewHost()) {
+    delete message;
+    return false;
+  }
+
+  return tab_contents_->GetRenderViewHost()->Send(message);
+}
+
+int WebContentsObserver::routing_id() const {
+  if (!tab_contents_ || !tab_contents_->GetRenderViewHost())
+    return MSG_ROUTING_NONE;
+
+  return tab_contents_->GetRenderViewHost()->routing_id();
+}
+
+void WebContentsObserver::TabContentsDestroyed() {
+  // Do cleanup so that 'this' can safely be deleted from
+  // TabContentsDestroyed.
+  tab_contents_->RemoveObserver(this);
+  TabContents* tab = tab_contents_;
+  tab_contents_ = NULL;
+  TabContentsDestroyed(tab);
+}
+
+}  // namespace content