Fix a regression in character-at stub when doing a keyed load on a string. ...

src/arm/ic-arm.cc

Index: src/arm/ic-arm.cc
===================================================================
--- src/arm/ic-arm.cc	(revision 5468)
+++ src/arm/ic-arm.cc	(working copy)
@@ -1236,7 +1236,6 @@
   //  -- r1     : receiver
   // -----------------------------------
   Label miss;
-  Label index_out_of_range;
 
   Register receiver = r1;
   Register index = r0;
@@ -1251,7 +1250,7 @@
                                           result,
                                           &miss,  // When not a string.
                                           &miss,  // When not a number.
-                                          &index_out_of_range,
+                                          &miss,  // When index out of range.
                                           STRING_INDEX_IS_ARRAY_INDEX);
   char_at_generator.GenerateFast(masm);
   __ Ret();
@@ -1259,10 +1258,6 @@
   ICRuntimeCallHelper call_helper;
   char_at_generator.GenerateSlow(masm, call_helper);
 
-  __ bind(&index_out_of_range);
-  __ LoadRoot(r0, Heap::kUndefinedValueRootIndex);
-  __ Ret();
-
   __ bind(&miss);
   GenerateMiss(masm);
 }