Move page action manifest parsing out of Extension; the first multi-key manifest handler.

chrome/common/extensions/extension_file_util.cc

Index: chrome/common/extensions/extension_file_util.cc
diff --git a/chrome/common/extensions/extension_file_util.cc b/chrome/common/extensions/extension_file_util.cc
index 59f8b35f4face2ae784f4b8a30459b2c7154cb76..aa14e17290cb22d6b26a2b1a98772c433a479a31 100644
--- a/chrome/common/extensions/extension_file_util.cc
+++ b/chrome/common/extensions/extension_file_util.cc
@@ -329,7 +329,8 @@ bool ValidateExtension(const Extension* extension,
     }
   }
 
-  const extensions::ActionInfo* action = extension->page_action_info();
+  const extensions::ActionInfo* action =
+      extensions::ActionInfo::GetPageActionInfo(extension);
   if (action && !action->default_icon.empty() &&
       !ValidateExtensionIconSet(action->default_icon, extension,
           IDS_EXTENSION_LOAD_ICON_FOR_PAGE_ACTION_FAILED, error)) {