Make the internal storage of policy::Schemas ref counted.

chrome/common/extensions/api/storage/storage_schema_manifest_handler.h

Index: chrome/common/extensions/api/storage/storage_schema_manifest_handler.h
diff --git a/chrome/common/extensions/api/storage/storage_schema_manifest_handler.h b/chrome/common/extensions/api/storage/storage_schema_manifest_handler.h
index 15bf822b4a9c43dea359f4e8ff1a228c3b25ac65..89e0c28a9aa38e5be1f397b6094f73fcda0aacb1 100644
--- a/chrome/common/extensions/api/storage/storage_schema_manifest_handler.h
+++ b/chrome/common/extensions/api/storage/storage_schema_manifest_handler.h
@@ -9,7 +9,7 @@
 #include "extensions/common/manifest_handler.h"
 
 namespace policy {
-class SchemaOwner;
+class Schema;
 }
 
 namespace extensions {
@@ -22,11 +22,11 @@ class StorageSchemaManifestHandler : public ManifestHandler {
 
 #if defined(ENABLE_CONFIGURATION_POLICY)
   // Returns the managed storage schema defined for |extension|.
-  // If the schema is invalid then NULL is returned, and the failure reason
-  // is stored in |error|.
+  // If the schema is invalid then the Schema returned is invalid too, and
+  // the failure reason is stored in |error|.
   // This function does file I/O and must be called on a thread that allows I/O.
-  static scoped_ptr<policy::SchemaOwner> GetSchema(const Extension* extension,
-                                                   std::string* error);
+  static policy::Schema GetSchema(const Extension* extension,
+                                  std::string* error);
 #endif
 
  private: