Do not cache CodeStubInterfaceDescriptor on the isolate.

src/compiler/linkage.cc

Index: src/compiler/linkage.cc
diff --git a/src/compiler/linkage.cc b/src/compiler/linkage.cc
index 9fac9c347307a8cf3a13dad3251fb7f4a1043598..e6e53b14d6388f1ccd6d5d2ee3e24aa51d946604 100644
--- a/src/compiler/linkage.cc
+++ b/src/compiler/linkage.cc
@@ -52,9 +52,9 @@ Linkage::Linkage(CompilationInfo* info) : info_(info) {
   } else if (info->code_stub() != NULL) {
     // Use the code stub interface descriptor.
     HydrogenCodeStub* stub = info->code_stub();
-    CodeStubInterfaceDescriptor* descriptor =
-        info_->isolate()->code_stub_interface_descriptor(stub->MajorKey());
-    incoming_ = GetStubCallDescriptor(descriptor);
+    CodeStubInterfaceDescriptor descriptor;
+    stub->InitializeInterfaceDescriptor(&descriptor);
+    incoming_ = GetStubCallDescriptor(&descriptor);
   } else {
     incoming_ = NULL;  // TODO(titzer): ?
   }