Oilpan: Make the GC heuristics saner

Source/platform/heap/ThreadState.h

Index: Source/platform/heap/ThreadState.h
diff --git a/Source/platform/heap/ThreadState.h b/Source/platform/heap/ThreadState.h
index 78ab339a55d101e1b0bc9466fb95a04dce6e7f62..87dc14bd9fb668eb5bf6f5f16f767b3e4e05d59e 100644
--- a/Source/platform/heap/ThreadState.h
+++ b/Source/platform/heap/ThreadState.h
@@ -322,8 +322,6 @@ public:
     bool checkThread() const { return m_thread == currentThread(); }
 #endif
 
-    void didV8MajorGC();
-
     void performIdleGC(double deadlineSeconds);
     void performIdleLazySweep(double deadlineSeconds);
 
@@ -482,15 +480,15 @@ public:
     // TODO(haraken): Currently CrossThreadPersistent handles are not counted.
     // This wouldn't be a big deal because # of CrossThreadPersistents is small,
     // but should be fixed.
-    void persistentAllocated()
+    void wrapperAllocated()
     {
-        ++m_persistentAllocated;
+        ++m_wrapperAllocated;
     }
-    void persistentFreed()
+    void wrapperFreed()
     {
-        ++m_persistentFreed;
+        ++m_wrapperFreed;
     }
-    void updatePersistentCounters();
+    void updateWrapperCounters();
 
     // Visit local thread stack and trace all pointers conservatively.
     void visitStack(Visitor*);
@@ -698,8 +696,9 @@ private:
     // Internal helper for GC policy handling code. Returns true if
     // an urgent conservative GC is now needed due to memory pressure.
     bool shouldForceMemoryPressureGC();
-    size_t estimatedLiveObjectSize();
-    size_t currentObjectSize();
+    double partitionAllocGrowingRate();
+    double heapGrowingRate();
+    bool judgeGCThreshold(size_t allocatedObjectSizeThreshold, double heapGrowingRateThreshold, double partitionAllocGrowingRateThreshold);
 
     void runScheduledGC(StackState);
 
@@ -766,8 +765,8 @@ private:
     bool m_sweepForbidden;
     size_t m_noAllocationCount;
     size_t m_gcForbiddenCount;
-    int m_persistentAllocated;
-    int m_persistentFreed;
+    int m_wrapperAllocated;
+    int m_wrapperFreed;
     BaseHeap* m_heaps[NumberOfHeaps];
 
     int m_vectorBackingHeapIndex;