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

test/cctest/test-code-stubs-x64.cc

Index: test/cctest/test-code-stubs-x64.cc
diff --git a/test/cctest/test-code-stubs-x64.cc b/test/cctest/test-code-stubs-x64.cc
index 348b21aca5958612a1a083db98ed88bdd61e8ce0..a63209ffa3125b28e41f7199a40e7078ce36cbd8 100644
--- a/test/cctest/test-code-stubs-x64.cc
+++ b/test/cctest/test-code-stubs-x64.cc
@@ -54,7 +54,7 @@ ConvertDToIFunc MakeConvertDToIFuncTrampoline(Isolate* isolate,
   MacroAssembler assm(isolate, buffer, static_cast<int>(actual_size));
   int offset =
     source_reg.is(rsp) ? 0 : (HeapNumber::kValueOffset - kSmiTagSize);
-  DoubleToIStub stub(source_reg, destination_reg, offset, true);
+  DoubleToIStub stub(isolate, source_reg, destination_reg, offset, true);
   byte* start = stub.GetCode(isolate)->instruction_start();
 
   __ pushq(rbx);