Low memory page navigation GC for low end devices

third_party/WebKit/Source/platform/wtf/allocator/Partitions.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 69 matching lines @@
 
   static size_t TotalSizeOfCommittedPages() {
     size_t total_size = 0;
     total_size += fast_malloc_allocator_.root()->total_size_of_committed_pages;
     total_size += array_buffer_allocator_.root()->total_size_of_committed_pages;
     total_size += buffer_allocator_.root()->total_size_of_committed_pages;
     total_size += layout_allocator_.root()->total_size_of_committed_pages;
     return total_size;
   }
 
+  static size_t TotalActiveBytes();
+
   static void DecommitFreeableMemory();
 
   static void ReportMemoryUsageHistogram();
 
   static void DumpMemoryStats(bool is_light_dump, base::PartitionStatsDumper*);
 
   ALWAYS_INLINE static void* BufferMalloc(size_t n, const char* type_name) {
     return PartitionAllocGeneric(BufferPartition(), n, type_name);
   }
   ALWAYS_INLINE static void* BufferRealloc(void* p,
@@ skipping 59 matching lines @@
 using base::PageAccessible;
 using base::PageInaccessible;
 using base::PartitionStatsDumper;
 using base::PartitionMemoryStats;
 using base::PartitionBucketMemoryStats;
 using base::PartitionAllocHooks;
 
 }  // namespace WTF
 
 #endif  // Partitions_h