Move Extension into extensions namespace

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 71e8b60df377bd519bc0b6d2c50c74bef8be84a1..43547da358851f6ca72d3462efb2811e6bf3e0c0 100644
--- a/chrome/browser/extensions/extension_process_manager.cc
+++ b/chrome/browser/extensions/extension_process_manager.cc
@@ -42,6 +42,7 @@ using content::OpenURLParams;
 using content::Referrer;
 using content::RenderViewHost;
 using content::SiteInstance;
+using extensions::Extension;
 
 namespace {
 
@@ -539,7 +540,8 @@ void ExtensionProcessManager::Observe(
 
     case chrome::NOTIFICATION_EXTENSION_UNLOADED: {
       const Extension* extension =
-          content::Details<UnloadedExtensionInfo>(details)->extension;
+          content::Details<extensions::UnloadedExtensionInfo>(
+              details)->extension;
       for (ExtensionHostSet::iterator iter = background_hosts_.begin();
            iter != background_hosts_.end(); ++iter) {
         ExtensionHost* host = *iter;