[Isolates] More handle improvements:

src/runtime.h

 // Copyright 2010 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 495 matching lines @@
                          Handle<String> pat,
                          int index);
 
   static bool IsUpperCaseChar(RuntimeState* runtime_state, uint16_t ch);
 
   // TODO(1240886): The following three methods are *not* handle safe,
   // but accept handle arguments. This seems fragile.
 
   // Support getting the characters in a string using [] notation as
   // in Firefox/SpiderMonkey, Safari and Opera.
-  static Object* GetElementOrCharAt(Heap* heap,
+  static Object* GetElementOrCharAt(Isolate* isolate,
                                     Handle<Object> object,
                                     uint32_t index);
   static Object* GetElement(Handle<Object> object, uint32_t index);
 
-  static Object* SetObjectProperty(Heap* heap,
+  static Object* SetObjectProperty(Isolate* isolate,
                                    Handle<Object> object,
                                    Handle<Object> key,
                                    Handle<Object> value,
                                    PropertyAttributes attr);
 
-  static Object* ForceSetObjectProperty(Handle<JSObject> object,
+  static Object* ForceSetObjectProperty(Isolate* isolate,
+                                        Handle<JSObject> object,
                                         Handle<Object> key,
                                         Handle<Object> value,
                                         PropertyAttributes attr);
 
-  static Object* ForceDeleteObjectProperty(Heap* heap,
+  static Object* ForceDeleteObjectProperty(Isolate* isolate,
                                            Handle<JSObject> object,
                                            Handle<Object> key);
 
-  static Object* GetObjectProperty(Heap* heap,
+  static Object* GetObjectProperty(Isolate* isolate,
                                    Handle<Object> object,
                                    Handle<Object> key);
 
   // This function is used in FunctionNameUsing* tests.
-  static Object* FindSharedFunctionInfoInScript(Heap* heap,
+  static Object* FindSharedFunctionInfoInScript(Isolate* isolate,
                                                 Handle<Script> script,
                                                 int position);
 
   // Helper functions used stubs.
   static void PerformGC(Object* result);
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_RUNTIME_H_