Add size_t length argument to v8::ArrayBuffer::Allocator::Free.

src/d8.cc

Index: src/d8.cc
diff --git a/src/d8.cc b/src/d8.cc
index e66a2ece600bb0ab54da79510cb4a7db96f75d89..9471aa4874dd7e1c5cd2767758b0071f1945d3fa 100644
--- a/src/d8.cc
+++ b/src/d8.cc
@@ -1635,7 +1635,13 @@ class ShellArrayBufferAllocator : public v8::ArrayBuffer::Allocator {
   virtual void* AllocateUninitialized(size_t length) {
     return malloc(length);
   }
-  virtual void Free(void* data) { free(data); }
+  virtual void Free(void* data, size_t) { free(data); }
+  // TODO(dslomov): Remove when v8:2823 is fixed.
+  virtual void Free(void* data) {
+#ifndef V8_SHARED
+    UNREACHABLE();
+#endif
+  }
 };