Add partitionsOutOfMemoryUsingXXX to know Blink memory usage from OOM crash reports

Source/wtf/Partitions.cpp

 /*
  * 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 33 matching lines @@
 PartitionAllocatorGeneric Partitions::m_bufferAllocator;
 SizeSpecificPartitionAllocator<3328> Partitions::m_nodeAllocator;
 SizeSpecificPartitionAllocator<1024> Partitions::m_layoutAllocator;
 HistogramEnumerationFunction Partitions::m_histogramEnumeration = nullptr;
 
 void Partitions::initialize()
 {
     spinLockLock(&s_initializationLock);
 
     if (!s_initialized) {
+        partitionAllocGlobalInit(&Partitions::totalSizeOfCommittedPages);
         m_fastMallocAllocator.init();
         m_bufferAllocator.init();
         m_nodeAllocator.init();
         m_layoutAllocator.init();
         s_initialized = true;
     }
 
     spinLockUnlock(&s_initializationLock);
 }
 
@@ skipping 52 matching lines @@
     // accessed only on the main thread.
     ASSERT(isMainThread());
 
     partitionDumpStatsGeneric(fastMallocPartition(), "fast_malloc_partition", isLightDump, partitionStatsDumper);
     partitionDumpStatsGeneric(bufferPartition(), "buffer_partition", isLightDump, partitionStatsDumper);
     partitionDumpStats(nodePartition(), "node_partition", isLightDump, partitionStatsDumper);
     partitionDumpStats(layoutPartition(), "layout_partition", isLightDump, partitionStatsDumper);
 }
 
 } // namespace WTF