V8ScriptValueSerializer: Use PartitionAlloc for the buffer, and avoid copying it into a String.

third_party/WebKit/Source/wtf/allocator/Partitions.h

Index: third_party/WebKit/Source/wtf/allocator/Partitions.h
diff --git a/third_party/WebKit/Source/wtf/allocator/Partitions.h b/third_party/WebKit/Source/wtf/allocator/Partitions.h
index 506bb73a7700419163e7e4729d12d061297662bc..8fd74a3f73dc8bc2b0495b9a52a4108cdeff02fc 100644
--- a/third_party/WebKit/Source/wtf/allocator/Partitions.h
+++ b/third_party/WebKit/Source/wtf/allocator/Partitions.h
@@ -90,6 +90,11 @@ class WTF_EXPORT Partitions {
   ALWAYS_INLINE static void* bufferMalloc(size_t n, const char* typeName) {
     return partitionAllocGeneric(bufferPartition(), n, typeName);
   }
+  ALWAYS_INLINE static void* bufferRealloc(void* p,
+                                           size_t n,
+                                           const char* typeName) {
+    return partitionReallocGeneric(bufferPartition(), p, n, typeName);

[haraken, 2016/11/11 03:50:01]

Can we add a unit test to PartitionAllocTest?

[jbroman, 2016/11/11 16:14:58]

What kind of test would you want? We don't currently have unit tests for the
other shorthands (bufferMalloc, bufferFree, etc., which fill in one parameter of
the generic functions), and partitionReallocGeneric is covered by
PartitionAllocTest.GenericAlloc and PartitionAllocTest.Realloc.

+  }
   ALWAYS_INLINE static void bufferFree(void* p) {
     partitionFreeGeneric(bufferPartition(), p);
   }