Rename HandleConverter to NaClMessageScanner.

ppapi/proxy/nacl_message_scanner.h

 // Copyright (c) 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 PPAPI_PROXY_HANDLE_CONVERTER_H_
-#define PPAPI_PROXY_HANDLE_CONVERTER_H_
+#ifndef PPAPI_PROXY_NACL_MESSAGE_SCANNER_H_
+#define PPAPI_PROXY_NACL_MESSAGE_SCANNER_H_
 
 #include <map>
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "ppapi/proxy/ppapi_proxy_export.h"
 
 namespace IPC {
 class Message;
 }
 
 namespace ppapi {
 namespace proxy {
 
 class SerializedHandle;
 
-class PPAPI_PROXY_EXPORT HandleConverter {
+class PPAPI_PROXY_EXPORT NaClMessageScanner {
  public:
-  HandleConverter();
+  NaClMessageScanner();
 
-  // Convert the native handles in |msg| to NaCl style.
-  // In some cases (e.g., Windows), we need to re-write the contents of the
-  // message; in those cases, |new_msg_ptr| will be set to the new message.
-  // If |msg| is already in a good form for NaCl, |new_msg_ptr| is left NULL.
-  // See the explanation in the body of the method.
+  // Scans the message for items that require special handling. Copies any
+  // SerializedHandles in the message into |handles| and if the message must be
+  // rewritten for NaCl, sets |new_msg_ptr| to the new message. If no handles
+  // are found, |handles| is left unchanged. If no rewriting is needed,
+  // |new_msg_ptr| is left unchanged.
   //
-  // In either case, all the handles in |msg| are extracted into |handles| so
-  // that they can be converted to NaClDesc handles.
-  // See chrome/nacl/nacl_ipc_adapter.cc for where this gets used.
-  bool ConvertNativeHandlesToPosix(const IPC::Message& msg,
-                                   std::vector<SerializedHandle>* handles,
-                                   scoped_ptr<IPC::Message>* new_msg_ptr);
+  // See more explanation in the method definition.
+  //
+  // See chrome/nacl/nacl_ipc_adapter.cc for where this is used to help convert
+  // native handles to NaClDescs.
+  bool ScanMessage(const IPC::Message& msg,
+                   std::vector<SerializedHandle>* handles,
+                   scoped_ptr<IPC::Message>* new_msg_ptr);
 
-  // This method informs HandleConverter that a sync message is being sent so
-  // that it can associate reply messages with their type.
+  // This method informs NaClMessageScanner that a sync message is being sent
+  // so that it can associate reply messages with their type.
   //
-  // Users of HandleConverter must call this when they send a synchronous
-  // message, otherwise HandleConverter won't be able to convert handles in
-  // replies.
+  // Users of NaClMessageScanner must call this when they send a synchronous
+  // message, otherwise NaClMessageScanner won't scan replies.
   void RegisterSyncMessageForReply(const IPC::Message& msg);
 
  private:
   // When we send a synchronous message (from untrusted to trusted), we store
   // its type here, so that later we can associate the reply with its type
-  // and potentially translate handles in the message.
+  // for scanning.
   typedef std::map<int, uint32> PendingSyncMsgMap;
   PendingSyncMsgMap pending_sync_msgs_;
 
-  DISALLOW_COPY_AND_ASSIGN(HandleConverter);
+  DISALLOW_COPY_AND_ASSIGN(NaClMessageScanner);
 };
 
 }  // namespace proxy
 }  // namespace ppapi
 
-#endif  // PPAPI_PROXY_HANDLE_CONVERTER_H_
+#endif  // PPAPI_PROXY_NACL_MESSAGE_SCANNER_H_