Oilpan: rename GCState and GCReason values to reflect function only.

Source/platform/heap/ThreadState.h

 /*
  * 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 168 matching lines @@
     enum GCType {
         GCWithSweep, // Sweeping is completed in Heap::collectGarbage().
         GCWithoutSweep, // Lazy sweeping is scheduled.
     };
 
     // See setGCState() for possible state transitions.
     enum GCState {
         NoGCScheduled,
         IdleGCScheduled,
         PreciseGCScheduled,
-        GCScheduledForTesting,
+        FullGCScheduled,
         StoppingOtherThreads,
         GCRunning,
         EagerSweepScheduled,
         LazySweepScheduled,
         Sweeping,
         SweepingAndIdleGCScheduled,
         SweepingAndPreciseGCScheduled,
     };
 
     // The NoAllocationScope class is used in debug mode to catch unwanted
@@ skipping 536 matching lines @@
 };
 
 template<> class ThreadStateFor<AnyThread> {
 public:
     static ThreadState* state() { return ThreadState::current(); }
 };
 
 } // namespace blink
 
 #endif // ThreadState_h