Change EXTENSION_PROCESS_CREATED observers to use EXTENSION_HOST_CREATED.

chrome/browser/extensions/extension_process_manager.cc

 // 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 "base/bind.h"
 #include "base/command_line.h"
 #include "chrome/browser/extensions/extension_process_manager.h"
 
 #include "chrome/browser/ui/browser_window.h"
 #include "content/browser/browsing_instance.h"
@@ skipping 516 matching lines @@
   }
 }
 
 void ExtensionProcessManager::OnExtensionHostCreated(ExtensionHost* host,
                                                      bool is_background) {
   DCHECK_EQ(browsing_instance_->browser_context(), host->profile());
 
   all_hosts_.insert(host);
   if (is_background)
     background_hosts_.insert(host);
-  content::NotificationService::current()->Notify(
-      chrome::NOTIFICATION_EXTENSION_HOST_CREATED,
-      content::Source<ExtensionProcessManager>(this),
-      content::Details<ExtensionHost>(host));
 }
 
 void ExtensionProcessManager::CloseBackgroundHost(ExtensionHost* host) {
   CHECK(host->extension_host_type() ==
         chrome::VIEW_TYPE_EXTENSION_BACKGROUND_PAGE);
   delete host;
   // |host| should deregister itself from our structures.
   CHECK(background_hosts_.find(host) == background_hosts_.end());
 }
 
@@ skipping 126 matching lines @@
         if (service && service->is_ready())
           CreateBackgroundHostsForProfileStartup(this, service->extensions());
       }
       break;
     }
     default:
       ExtensionProcessManager::Observe(type, source, details);
       break;
   }
 }