CodeStubs contain their corresponding Isolate* now. (part 1)

src/heap.cc

Index: src/heap.cc
diff --git a/src/heap.cc b/src/heap.cc
index 5713537b5ab301076c51706d77f3eef5e5713970..f6f8b7c1e23123ffea8533c0c49bbb2ab32f1807 100644
--- a/src/heap.cc
+++ b/src/heap.cc
@@ -2779,13 +2779,13 @@ bool Heap::CreateApiObjects() {
 
 
 void Heap::CreateJSEntryStub() {
-  JSEntryStub stub;
+  JSEntryStub stub(isolate());
   set_js_entry_code(*stub.GetCode(isolate()));
 }
 
 
 void Heap::CreateJSConstructEntryStub() {
-  JSConstructEntryStub stub;
+  JSConstructEntryStub stub(isolate());
   set_js_construct_entry_code(*stub.GetCode(isolate()));
 }