Use a WeakCell in the CallIC type vector.

src/arm/interface-descriptors-arm.cc

Index: src/arm/interface-descriptors-arm.cc
diff --git a/src/arm/interface-descriptors-arm.cc b/src/arm/interface-descriptors-arm.cc
index cf6386a796c59f9db8702f76e7430b012c1e9a75..da0cba9d10b3c2f4d366a50874e062b698bd95eb 100644
--- a/src/arm/interface-descriptors-arm.cc
+++ b/src/arm/interface-descriptors-arm.cc
@@ -98,7 +98,19 @@ void FastCloneShallowObjectDescriptor::Initialize(
 void CreateAllocationSiteDescriptor::Initialize(
     CallInterfaceDescriptorData* data) {
   Register registers[] = {cp, r2, r3};
-  data->Initialize(arraysize(registers), registers, NULL);
+  Representation representations[] = {Representation::Tagged(),
+                                      Representation::Tagged(),
+                                      Representation::Smi()};
+  data->Initialize(arraysize(registers), registers, representations);
+}
+
+
+void CreateWeakCellDescriptor::Initialize(CallInterfaceDescriptorData* data) {
+  Register registers[] = {cp, r2, r3, r1};
+  Representation representations[] = {
+      Representation::Tagged(), Representation::Tagged(), Representation::Smi(),
+      Representation::Tagged()};
+  data->Initialize(arraysize(registers), registers, representations);
 }