gin: Make it possible to use gin array buffers when running on top of blink

gin/per_isolate_data.cc

Index: gin/per_isolate_data.cc
diff --git a/gin/per_isolate_data.cc b/gin/per_isolate_data.cc
index 6c2397ba50b0a67ef1bb20a516c1fc1ab6b49f34..7de9047abe8b17b7f790e8eb8491d1b597c8f894 100644
--- a/gin/per_isolate_data.cc
+++ b/gin/per_isolate_data.cc
@@ -5,6 +5,7 @@
 #include "gin/per_isolate_data.h"
 #include "gin/public/gin_embedders.h"
 
+using v8::ArrayBuffer;
 using v8::Eternal;
 using v8::Isolate;
 using v8::Local;
@@ -14,8 +15,9 @@ using v8::ObjectTemplate;
 
 namespace gin {
 
-PerIsolateData::PerIsolateData(Isolate* isolate)
-    : isolate_(isolate)  {
+PerIsolateData::PerIsolateData(Isolate* isolate,
+                               ArrayBuffer::Allocator* allocator)
+    : isolate_(isolate), allocator_(allocator) {
   isolate_->SetData(kEmbedderNativeGin, this);
 }