Move WebCache memory dump provider to blink for sub-allocation edges.

third_party/WebKit/Source/wtf/Partitions.h

Index: third_party/WebKit/Source/wtf/Partitions.h
diff --git a/third_party/WebKit/Source/wtf/Partitions.h b/third_party/WebKit/Source/wtf/Partitions.h
index 276380472bd64b9e5beed85d8c9c172309b45d2d..26cba27c280e228567ff370a2216607cadec745e 100644
--- a/third_party/WebKit/Source/wtf/Partitions.h
+++ b/third_party/WebKit/Source/wtf/Partitions.h
@@ -98,6 +98,9 @@ public:
 
     static void dumpMemoryStats(bool isLightDump, PartitionStatsDumper*);
 
+    static void setAllocatorPoolNameForTracing(const char* name) { m_allocatorPoolNameForTracing = name; }
+    static const char* allocatorPoolNameForTracing() { return m_allocatorPoolNameForTracing; }
+
     ALWAYS_INLINE static void* bufferMalloc(size_t n)
     {
         return partitionAllocGeneric(bufferPartition(), n);
@@ -143,6 +146,9 @@ private:
     static SizeSpecificPartitionAllocator<3328> m_nodeAllocator;
     static SizeSpecificPartitionAllocator<1024> m_layoutAllocator;
     static HistogramEnumerationFunction m_histogramEnumeration;
+
+    // Stores the allocator name used for tracing allocations from the partitions.
+    static const char* m_allocatorPoolNameForTracing;
 };
 
 } // namespace WTF