[oilpan] Rename PauseScope to SafePointScope

Source/core/workers/WorkerRunLoop.cpp

 /*
  * Copyright (C) 2009 Google Inc. 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
@@ skipping 143 matching lines @@
     double absoluteTime = 0.0;
     if (waitMode == WaitForMessage)
         absoluteTime = (predicate.isDefaultMode() && m_sharedTimer->isActive()) ? m_sharedTimer->fireTime() : MessageQueue<Task>::infiniteTime();
     MessageQueueWaitResult result;
 
     OwnPtr<WorkerRunLoop::Task> task;
     {
         // FIXME(oilpan): The WorkerContext is kept alive by a persistent handle in WorkerThread.h
         // and therefore there are no unknown heap pointers on the stack at this point.
         // We should probably make that more clear somehow.
-        ThreadState::PauseScope paused(ThreadState::NoHeapPointersOnStack);
+        ThreadState::SafePointScope safePointScope(ThreadState::NoHeapPointersOnStack);
         task = m_messageQueue.waitForMessageFilteredWithTimeout(result, predicate, absoluteTime);
     }
 
     // If the context is closing, don't execute any further JavaScript tasks (per section 4.1.1 of the Web Workers spec).  However, there may be implementation cleanup tasks in the queue, so keep running through it.
 
     switch (result) {
     case MessageQueueTerminated:
         break;
 
     case MessageQueueMessageReceived:
@@ skipping 55 matching lines @@
         m_task->performTask(context);
 }
 
 WorkerRunLoop::Task::Task(PassOwnPtr<ScriptExecutionContext::Task> task, const String& mode)
     : m_task(task)
     , m_mode(mode.isolatedCopy())
 {
 }
 
 } // namespace WebCore