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

Source/bindings/core/v8/V8GCController.cpp

Index: Source/bindings/core/v8/V8GCController.cpp
diff --git a/Source/bindings/core/v8/V8GCController.cpp b/Source/bindings/core/v8/V8GCController.cpp
index fb0869032cf7fff08b654c4135a471d92da4fe00..b367522e1ba7cc08c9dda849e287f11d02e8edc9 100644
--- a/Source/bindings/core/v8/V8GCController.cpp
+++ b/Source/bindings/core/v8/V8GCController.cpp
@@ -411,10 +411,10 @@ void V8GCController::gcEpilogue(v8::GCType type, v8::GCCallbackFlags flags)
         // to collect all garbage, you need to wait until the next event loop.
         // Regarding (2), it would be OK in practice to trigger only one GC per gcEpilogue, because
         // GCController.collectAll() forces 7 V8's GC.
-        Heap::collectGarbage(ThreadState::HeapPointersOnStack, ThreadState::GCWithSweep, Heap::ForcedGCForTesting);
+        Heap::collectGarbage(ThreadState::HeapPointersOnStack, ThreadState::GCWithSweep, Heap::ForcedGC);
 
         // Forces a precise GC at the end of the current event loop.
-        ThreadState::current()->setGCState(ThreadState::GCScheduledForTesting);
+        ThreadState::current()->setGCState(ThreadState::FullGCScheduled);
     }
 
     TRACE_EVENT_END1(TRACE_DISABLED_BY_DEFAULT("devtools.timeline"), "GCEvent", "usedHeapSizeAfter", usedHeapSize(isolate));