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

src/arm/ic-arm.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 473 matching lines @@
     Label invoke, global;
     __ ldr(r2, MemOperand(sp, argc * kPointerSize));  // receiver
     __ JumpIfSmi(r2, &invoke);
     __ CompareObjectType(r2, r3, r3, JS_GLOBAL_OBJECT_TYPE);
     __ b(eq, &global);
     __ cmp(r3, Operand(JS_BUILTINS_OBJECT_TYPE));
     __ b(ne, &invoke);
 
     // Patch the receiver on the stack.
     __ bind(&global);
-    CallStubCompiler::FetchGlobalProxy(masm, r2, r1);
+    __ LoadRoot(r2, Heap::kUndefinedValueRootIndex);
     __ str(r2, MemOperand(sp, argc * kPointerSize));
     __ bind(&invoke);
   }
 
   // Invoke the function.
   CallKind call_kind = CallICBase::Contextual::decode(extra_state)
       ? CALL_AS_FUNCTION
       : CALL_AS_METHOD;
   ParameterCount actual(argc);
   __ InvokeFunction(r1,
@@ skipping 1173 matching lines @@
   } else {
     ASSERT(Assembler::GetCondition(branch_instr) == ne);
     patcher.EmitCondition(eq);
   }
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_ARM