Adding v8_isolate_memory_dump_provider.

gin/public/isolate_holder.h

Index: gin/public/isolate_holder.h
diff --git a/gin/public/isolate_holder.h b/gin/public/isolate_holder.h
index ba75cd8f11654f653806776be1c750acd78e75a5..7bc31716319c383b1fc36050a37c0a15bb84f414 100644
--- a/gin/public/isolate_holder.h
+++ b/gin/public/isolate_holder.h
@@ -14,6 +14,7 @@ namespace gin {
 
 class PerIsolateData;
 class RunMicrotasksObserver;
+class V8IsolateMemoryDumpProvider;
 
 // To embed Gin, first initialize gin using IsolateHolder::Initialize and then
 // create an instance of IsolateHolder to hold the v8::Isolate in which you
@@ -56,6 +57,7 @@ class GIN_EXPORT IsolateHolder {
   v8::Isolate* isolate_;
   scoped_ptr<PerIsolateData> isolate_data_;
   scoped_ptr<RunMicrotasksObserver> task_observer_;
+  scoped_ptr<V8IsolateMemoryDumpProvider> isolate_memory_dump_provider_;
 
   DISALLOW_COPY_AND_ASSIGN(IsolateHolder);
 };