Fix Object.prototype.toString.call(proxy)

src/crankshaft/mips/lithium-codegen-mips.cc

Index: src/crankshaft/mips/lithium-codegen-mips.cc
diff --git a/src/crankshaft/mips/lithium-codegen-mips.cc b/src/crankshaft/mips/lithium-codegen-mips.cc
index 1480f23ad9b109e1a1633cd10d510b8962fd7b2e..85cd156296d275b25fdb60a9efc4264769357d6f 100644
--- a/src/crankshaft/mips/lithium-codegen-mips.cc
+++ b/src/crankshaft/mips/lithium-codegen-mips.cc
@@ -2453,23 +2453,20 @@ void LCodeGen::EmitClassOfTest(Label* is_true,
     // Assuming the following assertions, we can use the same compares to test
     // for both being a function type and being in the object type range.
     STATIC_ASSERT(NUM_OF_CALLABLE_SPEC_OBJECT_TYPES == 2);
-    STATIC_ASSERT(FIRST_NONCALLABLE_SPEC_OBJECT_TYPE ==
-                  FIRST_JS_RECEIVER_TYPE + 1);
     STATIC_ASSERT(LAST_NONCALLABLE_SPEC_OBJECT_TYPE ==
                   LAST_JS_RECEIVER_TYPE - 1);
     STATIC_ASSERT(LAST_JS_RECEIVER_TYPE == LAST_TYPE);
 
     __ GetObjectType(input, temp, temp2);
     __ Branch(is_false, lt, temp2, Operand(FIRST_JS_RECEIVER_TYPE));
-    __ Branch(is_true, eq, temp2, Operand(FIRST_JS_RECEIVER_TYPE));
     __ Branch(is_true, eq, temp2, Operand(LAST_JS_RECEIVER_TYPE));
   } else {
     // Faster code path to avoid two compares: subtract lower bound from the
     // actual type and do a signed compare with the width of the type range.
     __ GetObjectType(input, temp, temp2);
-    __ Subu(temp2, temp2, Operand(FIRST_NONCALLABLE_SPEC_OBJECT_TYPE));
+    __ Subu(temp2, temp2, Operand(FIRST_JS_RECEIVER_TYPE));
     __ Branch(is_false, gt, temp2, Operand(LAST_NONCALLABLE_SPEC_OBJECT_TYPE -
-                                           FIRST_NONCALLABLE_SPEC_OBJECT_TYPE));
+                                           FIRST_JS_RECEIVER_TYPE));
   }
 
   // Now we are in the FIRST-LAST_NONCALLABLE_SPEC_OBJECT_TYPE range.