Add partitionsOutOfMemoryUsingXXX to know Blink memory usage from OOM crash reports

Source/wtf/Partitions.cpp

Index: Source/wtf/Partitions.cpp
diff --git a/Source/wtf/Partitions.cpp b/Source/wtf/Partitions.cpp
index 1e996bc045488a6ebb09f4e6c1c97630cb18f50c..8486eda61e190c3d8db906ce29cb9dca9166ef76 100644
--- a/Source/wtf/Partitions.cpp
+++ b/Source/wtf/Partitions.cpp
@@ -51,6 +51,7 @@ void Partitions::initialize()
     spinLockLock(&s_initializationLock);
 
     if (!s_initialized) {
+        partitionAllocGlobalInit(&Partitions::totalSizeOfCommittedPages);
         m_fastMallocAllocator.init();
         m_bufferAllocator.init();
         m_nodeAllocator.init();