Move Extension into extensions namespace

chrome/browser/extensions/extension_infobar_delegate.cc

Index: chrome/browser/extensions/extension_infobar_delegate.cc
diff --git a/chrome/browser/extensions/extension_infobar_delegate.cc b/chrome/browser/extensions/extension_infobar_delegate.cc
index 0418d682be65a00cbfdb6ee2b8d3e9a9287b3a1a..8f9d8c744d72b02bb182860edece2c45593bb68a 100644
--- a/chrome/browser/extensions/extension_infobar_delegate.cc
+++ b/chrome/browser/extensions/extension_infobar_delegate.cc
@@ -18,7 +18,7 @@
 ExtensionInfoBarDelegate::ExtensionInfoBarDelegate(
     Browser* browser,
     InfoBarTabHelper* infobar_helper,
-    const Extension* extension,
+    const extensions::Extension* extension,
     const GURL& url,
     int height)
         : InfoBarDelegate(infobar_helper),
@@ -97,7 +97,8 @@ void ExtensionInfoBarDelegate::Observe(
   } else {
     DCHECK(type == chrome::NOTIFICATION_EXTENSION_UNLOADED);
     if (extension_ ==
-        content::Details<UnloadedExtensionInfo>(details)->extension) {
+        content::Details<extensions::UnloadedExtensionInfo>(
+            details)->extension) {
       RemoveSelf();
     }
   }