[oilpan] Rename PauseScope to SafePointScope

Source/heap/ThreadState.h

Index: Source/heap/ThreadState.h
diff --git a/Source/heap/ThreadState.h b/Source/heap/ThreadState.h
index 646102339f2a5f26127db32bdf7f63f547530ba5..d0388b4c5ebba90e80f70d1755e0079cee716d81 100644
--- a/Source/heap/ThreadState.h
+++ b/Source/heap/ThreadState.h
@@ -184,9 +184,9 @@ public:
 
     void executePendingAction();
 
-    void paused(StackState);
-    void resumed();
-    bool isPaused() const { return m_isPaused; }
+    void enterSafePoint(StackState);
+    void leaveSafePoint();
+    bool isInSafePoint() const { return m_inSafePoint; }
 
     bool shouldGC();
     bool shouldForceConservativeGC();
@@ -234,10 +234,10 @@ public:
 
     void safePoint();
 
-    class PauseScope {
+    class SafePointScope {
     public:
-        PauseScope(StackState stackState) { ThreadState::Current()->paused(stackState); }
-        ~PauseScope() { ThreadState::Current()->resumed(); }
+        SafePointScope(StackState stackState) { ThreadState::Current()->enterSafePoint(stackState); }
+        ~SafePointScope() { ThreadState::Current()->leaveSafePoint(); }
     };
 
     void visitStack(Visitor*);
@@ -286,7 +286,7 @@ private:
     bool pointersOnStack() const { return m_stackState == HeapPointersOnStack; }
 
     ThreadIdentifier m_thread;
-    bool m_isPaused;
+    bool m_inSafePoint;
     int m_inGC;
     PersistentNode* m_persistents;
     StackState m_stackState;