Refactored users of PolicySchema to use the new policy::Schema class.

components/policy/core/common/schema.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef COMPONENTS_POLICY_CORE_COMMON_SCHEMA_H_
 #define COMPONENTS_POLICY_CORE_COMMON_SCHEMA_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 12 matching lines @@
 
 }  // namespace internal
 
 // Describes the expected type of one policy. Also recursively describes the
 // types of inner elements, for structured types.
 // Objects of this class refer to external, immutable data and are cheap to
 // copy.
 // Use the SchemaOwner class to parse a schema and get Schema objects.
 class POLICY_EXPORT Schema {
  public:
+  // Builds an empty, invalid schema.
+  Schema();
+
+  // Builds a schema pointing to the inner structure of |schema|. If |schema|
+  // is NULL then this Schema instance will be invalid.
+  // Does not take ownership of |schema|.
   explicit Schema(const internal::SchemaNode* schema);
+
   Schema(const Schema& schema);
 
   Schema& operator=(const Schema& schema);
 
   // Returns true if this Schema is valid. Schemas returned by the methods below
   // may be invalid, and in those cases the other methods must not be used.
   bool valid() const { return schema_ != NULL; }
 
   base::Value::Type type() const;
 
@@ skipping 97 matching lines @@
   std::vector<internal::PropertyNode*> property_nodes_;
   ScopedVector<internal::PropertiesNode> properties_nodes_;
   ScopedVector<std::string> keys_;
 
   DISALLOW_COPY_AND_ASSIGN(SchemaOwner);
 };
 
 }  // namespace policy
 
 #endif  // COMPONENTS_POLICY_CORE_COMMON_SCHEMA_H_