Fetch strictmode in the interceptor setter from the IC.

src/x64/stub-cache-x64.cc

Index: src/x64/stub-cache-x64.cc
diff --git a/src/x64/stub-cache-x64.cc b/src/x64/stub-cache-x64.cc
index cfe94b6d69796b0c48e7499a3bd0721b298c5d01..ad39b51e961e3d3ea1963d09cd1e56a03458629a 100644
--- a/src/x64/stub-cache-x64.cc
+++ b/src/x64/stub-cache-x64.cc
@@ -2643,13 +2643,12 @@ Handle<Code> StoreStubCompiler::CompileStoreInterceptor(
   __ push(receiver());
   __ push(this->name());
   __ push(value());
-  __ Push(Smi::FromInt(strict_mode()));
   __ PushReturnAddressFrom(scratch1());
 
   // Do tail-call to the runtime system.
   ExternalReference store_ic_property =
       ExternalReference(IC_Utility(IC::kStoreInterceptorProperty), isolate());
-  __ TailCallExternalReference(store_ic_property, 4, 1);
+  __ TailCallExternalReference(store_ic_property, 3, 1);
 
   // Return the generated code.
   return GetCode(kind(), Code::FAST, name);