[runtime] Kill the %NumberToIntegerMapMinusZero runtime entry.

src/full-codegen/mips/full-codegen-mips.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #if V8_TARGET_ARCH_MIPS
 
 // Note on Mips implementation:
 //
 // The result_register() for mips is the 'v0' register, which is defined
 // by the ABI to contain function return values. However, the first
@@ skipping 2926 matching lines @@
 
   Register object = a1;
   Register index = a0;
   Register result = v0;
 
   PopOperand(object);
 
   Label need_conversion;
   Label index_out_of_range;
   Label done;
-  StringCharCodeAtGenerator generator(object,
-                                      index,
-                                      result,
-                                      &need_conversion,
-                                      &need_conversion,
-                                      &index_out_of_range,
-                                      STRING_INDEX_IS_NUMBER);
+  StringCharCodeAtGenerator generator(object, index, result, &need_conversion,
+                                      &need_conversion, &index_out_of_range);
   generator.GenerateFast(masm_);
   __ jmp(&done);
 
   __ bind(&index_out_of_range);
   // When the index is out of range, the spec requires us to return
   // NaN.
   __ LoadRoot(result, Heap::kNanValueRootIndex);
   __ jmp(&done);
 
   __ bind(&need_conversion);
@@ skipping 868 matching lines @@
          reinterpret_cast<uint32_t>(
              isolate->builtins()->OnStackReplacement()->entry()));
   return ON_STACK_REPLACEMENT;
 }
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_MIPS