Add API messages for IPC.

browser/api/atom_api_extensions.h

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+// Multiply-included file, no traditional include guard.
+
 // Used by atom_extensions.cc to declare a list of built-in modules of Atom.
 
 NODE_EXT_LIST_START

browser/native_window.cc

@@ -32,6 +32,9 @@ NativeWindow::NativeWindow(content::WebContents* web_contents,
   web_contents->SetDelegate(this);
 
   // Add window as an observer of the web contents.
+  content::WebContentsObserver::Observe(web_contents);
+
+  // Get notified of title updated message.
   registrar_.Add(this, content::NOTIFICATION_WEB_CONTENTS_TITLE_UPDATED,
       content::Source<content::WebContents>(web_contents));
 }
@@ -125,6 +128,10 @@ void NativeWindow::WebContentsCreated(
   window->InitFromOptions(options.get());
 }
 
+bool NativeWindow::OnMessageReceived(const IPC::Message& message) {
+  return false;
+}
+
 void NativeWindow::Observe(int type,
                            const content::NotificationSource& source,
                            const content::NotificationDetails& details) {

browser/native_window.h

@@ -15,6 +15,7 @@
 #include "content/public/browser/notification_registrar.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/web_contents_delegate.h"
+#include "content/public/browser/web_contents_observer.h"
 
 namespace base {
 class DictionaryValue;
@@ -38,6 +39,7 @@ class Size;
 namespace atom {
 
 class NativeWindow : public content::WebContentsDelegate,
+                     public content::WebContentsObserver,
                      public content::NotificationObserver {
  public:
   virtual ~NativeWindow();
@@ -108,6 +110,9 @@ class NativeWindow : public content::WebContentsDelegate,
                                   const GURL& target_url,
                                   content::WebContents* new_contents) OVERRIDE;
 
+  // Implementations of content::WebContentsObserver.
+  virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
+
   // Implementations of content::NotificationObserver
   virtual void Observe(int type,
                        const content::NotificationSource& source,