Make the Isolate parameter mandatory in Locker and Unlocker classes.

src/d8.h

Index: src/d8.h
diff --git a/src/d8.h b/src/d8.h
index 07699e85c0137847baf49d4990d9954ff48a16b1..63efd665c3f036a071678cbf531a683dc1139723 100644
--- a/src/d8.h
+++ b/src/d8.h
@@ -381,7 +381,7 @@ class Shell : public i::AllStatic {
   static i::Mutex* context_mutex_;
 
   static Counter* GetCounter(const char* name, bool is_histogram);
-  static void InstallUtilityScript();
+  static void InstallUtilityScript(Isolate* isolate);
 #endif  // V8_SHARED
   static void Initialize(Isolate* isolate);
   static void InitializeDebugger(Isolate* isolate);