Move small c/b/extensions classes into extensions namespace no.2

Since these classes are small, they can be all be moved in one cl without it
becoming overly large.

This one moves:
- ExtensionDataDeleter (now extensions::DataDeleter)
- ExtensionNavigationObserver (now extensions::NavigationObserver)
- PackExtensionJob
- PlatformAppBrowsertest
- ShellWindowRegistry
- ExtensionStartupUtil (see note in file)

BUG=117261
[email protected]

Review URL: https://chromiumcodereview.appspot.com/10824204

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@151535 0039d316-1c4b-4281-b951-d872f2087c98
diff --git a/chrome/browser/extensions/extension_service.cc b/chrome/browser/extensions/extension_service.cc
index 6425c251..8f3e8c0 100644
--- a/chrome/browser/extensions/extension_service.cc
+++ b/chrome/browser/extensions/extension_service.cc
@@ -43,8 +43,8 @@
 #include "chrome/browser/extensions/browser_event_router.h"
 #include "chrome/browser/extensions/component_loader.h"
 #include "chrome/browser/extensions/crx_installer.h"
+#include "chrome/browser/extensions/data_deleter.h"
 #include "chrome/browser/extensions/default_apps_trial.h"
-#include "chrome/browser/extensions/extension_data_deleter.h"
 #include "chrome/browser/extensions/extension_disabled_ui.h"
 #include "chrome/browser/extensions/extension_error_reporter.h"
 #include "chrome/browser/extensions/extension_error_ui.h"
@@ -757,10 +757,10 @@
   if (extension->is_hosted_app() &&
       !profile_->GetExtensionSpecialStoragePolicy()->
           IsStorageProtected(launch_web_url_origin)) {
-    ExtensionDataDeleter::StartDeleting(
+    extensions::DataDeleter::StartDeleting(
         profile_, extension_id, launch_web_url_origin, is_storage_isolated);
   }
-  ExtensionDataDeleter::StartDeleting(
+  extensions::DataDeleter::StartDeleting(
       profile_, extension_id, extension->url(), is_storage_isolated);
 
   UntrackTerminatedExtension(extension_id);