Issue 172109: Enable scavenging in RenderThread::IdleHandler....

third_party/tcmalloc/tcmalloc.cc

 // Copyright (c) 2005, 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 598 matching lines @@
 
   virtual void MarkThreadIdle() {
     ThreadCache::BecomeIdle();
   }
 
   virtual void ReleaseFreeMemory() {
     SpinLockHolder h(Static::pageheap_lock());
     Static::pageheap()->ReleaseFreePages();
   }
 
+  virtual void Scavenge() {
+    SpinLockHolder h(Static::pageheap_lock());
+    Static::pageheap()->Scavenge();
+  }
+
   virtual void SetMemoryReleaseRate(double rate) {
     FLAGS_tcmalloc_release_rate = rate;
   }
 
   virtual double GetMemoryReleaseRate() {
     return FLAGS_tcmalloc_release_rate;
   }
   virtual size_t GetEstimatedAllocatedSize(size_t size) {
     if (size <= kMaxSize) {
       const size_t cl = Static::sizemap()->SizeClass(size);
@@ skipping 655 matching lines @@
 static void *MemalignOverride(size_t align, size_t size, const void *caller)
     __THROW ATTRIBUTE_SECTION(google_malloc);
 
 static void *MemalignOverride(size_t align, size_t size, const void *caller)
     __THROW {
   void* result = do_memalign(align, size);
   MallocHook::InvokeNewHook(result, size);
   return result;
 }
 void *(*__memalign_hook)(size_t, size_t, const void *) = MemalignOverride;