Change EXTENSION_PROCESS_CREATED observers to use EXTENSION_HOST_CREATED.

chrome/browser/extensions/extension_process_manager.cc

Index: chrome/browser/extensions/extension_process_manager.cc
diff --git a/chrome/browser/extensions/extension_process_manager.cc b/chrome/browser/extensions/extension_process_manager.cc
index b79a35e3f3f32ad45e8892502deae32fee473e9a..ae71ea37c70106f69eb6eb0c94aab87bea587b3f 100644
--- a/chrome/browser/extensions/extension_process_manager.cc
+++ b/chrome/browser/extensions/extension_process_manager.cc
@@ -97,7 +97,8 @@ ExtensionProcessManager* ExtensionProcessManager::Create(Profile* profile) {
 }
 
 ExtensionProcessManager::ExtensionProcessManager(Profile* profile)
-    : browsing_instance_(new BrowsingInstance(profile)) {
+    : browsing_instance_(new BrowsingInstance(profile)),
+      profile_(profile) {
   Profile* original_profile = profile->GetOriginalProfile();
   registrar_.Add(this, chrome::NOTIFICATION_EXTENSIONS_READY,
                  content::Source<Profile>(original_profile));
@@ -536,7 +537,7 @@ void ExtensionProcessManager::OnExtensionHostCreated(ExtensionHost* host,
     background_hosts_.insert(host);
   content::NotificationService::current()->Notify(
       chrome::NOTIFICATION_EXTENSION_HOST_CREATED,
-      content::Source<ExtensionProcessManager>(this),
+      content::Source<Profile>(profile_),
       content::Details<ExtensionHost>(host));
 }