Deinline PartitionAlloc from DefaultAllocator to reduce code size

Source/wtf/DefaultAllocator.h

Index: Source/wtf/DefaultAllocator.h
diff --git a/Source/wtf/DefaultAllocator.h b/Source/wtf/DefaultAllocator.h
index 2d14e709a467ee7296911efea6be383335b4a28a..9be80e3f72da987db061199c753b5e4380ac37bd 100644
--- a/Source/wtf/DefaultAllocator.h
+++ b/Source/wtf/DefaultAllocator.h
@@ -73,12 +73,12 @@ public:
     template <typename Return, typename Metadata>
     static Return backingMalloc(size_t size)
     {
-        return reinterpret_cast<Return>(partitionAllocGeneric(Partitions::getBufferPartition(), size));
+        return reinterpret_cast<Return>(backingAllocate(size));
     }
     template <typename Return, typename Metadata>
     static Return zeroedBackingMalloc(size_t size)
     {
-        void* result = partitionAllocGeneric(Partitions::getBufferPartition(), size);
+        void* result = backingAllocate(size);
         memset(result, 0, size);
         return reinterpret_cast<Return>(result);
     }
@@ -87,10 +87,7 @@ public:
     {
         return reinterpret_cast<Return>(fastMalloc(size));
     }
-    static void backingFree(void* address)
-    {
-        partitionFreeGeneric(Partitions::getBufferPartition(), address);
-    }
+    WTF_EXPORT static void backingFree(void* address);
     static void free(void* address)
     {
         fastFree(address);
@@ -132,6 +129,9 @@ public:
     {
         return *other;
     }
+
+private:
+    WTF_EXPORT static void* backingAllocate(size_t);
 };
 
 // The Windows compiler seems to be very eager to instantiate things it won't