Code cleaning: Uses scoped_ptr<> to express ownership rather than writing ownership in comments.

dbus/message.h

 // Copyright (c) 2012 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 DBUS_MESSAGE_H_
 #define DBUS_MESSAGE_H_
 
 #include <string>
 #include <vector>
 #include <dbus/dbus.h>
 
 #include "base/basictypes.h"
+#include "base/memory/scoped_ptr.h"
 #include "dbus/dbus_export.h"
 #include "dbus/file_descriptor.h"
 #include "dbus/object_path.h"
 
 namespace google {
 namespace protobuf {
 
 class MessageLite;
 
 }  // namespace protobuf
@@ skipping 170 matching lines @@
   Signal();
 
   DISALLOW_COPY_AND_ASSIGN(Signal);
 };
 
 // Response is a type of message used for receiving a response from a
 // method via D-Bus.
 class CHROME_DBUS_EXPORT Response : public Message {
  public:
   // Returns a newly created Response from the given raw message of the
-  // type DBUS_MESSAGE_TYPE_METHOD_RETURN. The caller must delete the
-  // returned object. Takes the ownership of |raw_message|.
-  static Response* FromRawMessage(DBusMessage* raw_message);
+  // type DBUS_MESSAGE_TYPE_METHOD_RETURN. Takes the ownership of |raw_message|.
+  static scoped_ptr<Response> FromRawMessage(DBusMessage* raw_message);
 
-  // Returns a newly created Response from the given method call. The
-  // caller must delete the returned object. Used for implementing
-  // exported methods.
-  static Response* FromMethodCall(MethodCall* method_call);
+  // Returns a newly created Response from the given method call.
+  // Used for implementing exported methods. Does NOT take the ownership of
+  // |method_call|.
+  static scoped_ptr<Response> FromMethodCall(MethodCall* method_call);
 
-  // Returns a newly created Response with an empty payload. The caller
-  // must delete the returned object. Useful for testing.
-  static Response* CreateEmpty();
+  // Returns a newly created Response with an empty payload.
+  // Useful for testing.
+  static scoped_ptr<Response> CreateEmpty();
 
  protected:
   // Creates a Response message. The internal raw message is NULL.
   Response();
 
  private:
   DISALLOW_COPY_AND_ASSIGN(Response);
 };
 
 // ErrorResponse is a type of message used to return an error to the
 // caller of a method.
 class CHROME_DBUS_EXPORT ErrorResponse: public Response {
  public:
   // Returns a newly created Response from the given raw message of the
-  // type DBUS_MESSAGE_TYPE_METHOD_RETURN. The caller must delete the
-  // returned object. Takes the ownership of |raw_message|.
-  static ErrorResponse* FromRawMessage(DBusMessage* raw_message);
+  // type DBUS_MESSAGE_TYPE_METHOD_RETURN. Takes the ownership of |raw_message|.
+  static scoped_ptr<ErrorResponse> FromRawMessage(DBusMessage* raw_message);
 
   // Returns a newly created ErrorResponse from the given method call, the
   // error name, and the error message.  The error name looks like
   // "org.freedesktop.DBus.Error.Failed". Used for returning an error to a
-  // failed method call.
-  static ErrorResponse* FromMethodCall(MethodCall* method_call,
-                                       const std::string& error_name,
-                                       const std::string& error_message);
+  // failed method call. Does NOT take the ownership of |method_call|.
+  static scoped_ptr<ErrorResponse> FromMethodCall(
+      MethodCall* method_call,
+      const std::string& error_name,
+      const std::string& error_message);
 
  private:
   // Creates an ErrorResponse message. The internal raw message is NULL.
   ErrorResponse();
 
   DISALLOW_COPY_AND_ASSIGN(ErrorResponse);
 };
 
 // MessageWriter is used to write outgoing messages for calling methods
 // and sending signals.
@@ skipping 226 matching lines @@
 
   Message* message_;
   DBusMessageIter raw_message_iter_;
 
   DISALLOW_COPY_AND_ASSIGN(MessageReader);
 };
 
 }  // namespace dbus
 
 #endif  // DBUS_MESSAGE_H_