[oilpan] Rename PauseScope to SafePointScope

Source/heap/Heap.cpp

 /*
  * Copyright (C) 2013 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 1413 matching lines @@
 public:
     GCScope(ThreadState::StackState stackState)
         : m_state(ThreadState::Current())
     {
         m_state->setGCRequested(false);
         m_state->checkThread();
 
         // FIXME(oilpan): in an unlikely coincidence two threads might decide to collect
         // garbage at the same time. Avoid doing two GCs in a row.
         ASSERT(!m_state->isInGC());
-        ASSERT(!m_state->isPaused());
+        ASSERT(!m_state->isInSafePoint());
         ThreadState::stopThreads(stackState);
         m_state->enterGC();
     }
 
     ~GCScope()
     {
         m_state->leaveGC();
         if (!m_state->isInGC())
             ThreadState::resumeThreads();
     }
@@ skipping 251 matching lines @@
     doNothingTrace,
     0,
     false
 };
 
 #ifdef ENABLE_PERF_STATS
 bool Heap::s_isCollectingStats = false;
 #endif
 
 } // namespace WebCore