MIPS: Make the strict-mode calling convention for contextual calls the default one.

src/mips/ic-mips.cc

Index: src/mips/ic-mips.cc
diff --git a/src/mips/ic-mips.cc b/src/mips/ic-mips.cc
index aeae456072b31766dde37570480838e08189f46d..798abfceca0ab455aa96bbd72c175251309202a6 100644
--- a/src/mips/ic-mips.cc
+++ b/src/mips/ic-mips.cc
@@ -493,7 +493,7 @@ void CallICBase::GenerateMiss(MacroAssembler* masm,
 
     // Patch the receiver on the stack.
     __ bind(&global);
-    CallStubCompiler::FetchGlobalProxy(masm, a2, a1);
+    __ LoadRoot(a2, Heap::kUndefinedValueRootIndex);
     __ sw(a2, MemOperand(sp, argc * kPointerSize));
     __ bind(&invoke);
   }