Simplify implementation of Mutex.

src/d8-debug.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 230 matching lines @@
 
 void RemoteDebugger::ConnectionClosed() {
   RemoteDebuggerEvent* event =
       new RemoteDebuggerEvent(RemoteDebuggerEvent::kDisconnect,
                               i::SmartArrayPointer<char>());
   AddEvent(event);
 }
 
 
 void RemoteDebugger::AddEvent(RemoteDebuggerEvent* event) {
-  i::ScopedLock lock(event_access_);
+  i::ScopedLock lock(&event_access_);
   if (head_ == NULL) {
     ASSERT(tail_ == NULL);
     head_ = event;
     tail_ = event;
   } else {
     ASSERT(tail_ != NULL);
     tail_->set_next(event);
     tail_ = event;
   }
   event_available_->Signal();
 }
 
 
 RemoteDebuggerEvent* RemoteDebugger::GetEvent() {
-  i::ScopedLock lock(event_access_);
+  i::ScopedLock lock(&event_access_);
   ASSERT(head_ != NULL);
   RemoteDebuggerEvent* result = head_;
   head_ = head_->next();
   if (head_ == NULL) {
     ASSERT(tail_ == result);
     tail_ = NULL;
   }
   return result;
 }
 
@@ skipping 88 matching lines @@
     // Pass the keyboard command to the main thread.
     remote_debugger_->KeyboardCommand(
         i::SmartArrayPointer<char>(i::StrDup(command)));
   }
 }
 
 
 }  // namespace v8
 
 #endif  // ENABLE_DEBUGGER_SUPPORT