Remove SafePointAwareMutexLocker

third_party/WebKit/Source/platform/heap/SafePoint.cpp

 // Copyright 2015 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.
 
 #include "platform/heap/SafePoint.h"
 
 #include "platform/heap/Heap.h"
 
 namespace blink {
 
 using PushAllRegistersCallback = void (*)(SafePointBarrier*,
                                           ThreadState*,
                                           intptr_t*);
 extern "C" void pushAllRegisters(SafePointBarrier*,
                                  ThreadState*,
                                  PushAllRegistersCallback);
 
 SafePointBarrier::SafePointBarrier() {}
 
 SafePointBarrier::~SafePointBarrier() {}
 
 void SafePointBarrier::enterSafePoint(ThreadState* state) {
   ASSERT(!state->sweepForbidden());
   pushAllRegisters(this, state, enterSafePointAfterPushRegisters);
 }
 
-void SafePointBarrier::leaveSafePoint(ThreadState* state,
-                                      SafePointAwareMutexLocker* locker) {
-}
+void SafePointBarrier::leaveSafePoint() {}
 
 void SafePointBarrier::doEnterSafePoint(ThreadState* state,
                                         intptr_t* stackEnd) {
   state->recordStackEnd(stackEnd);
   state->copyStackUntilSafePointScope();
 }
 
 }  // namespace blink