Minor cleanups of numeric seeded hashing patch.

src/arm/code-stubs-arm.cc

Index: src/arm/code-stubs-arm.cc
===================================================================
--- src/arm/code-stubs-arm.cc	(revision 10365)
+++ src/arm/code-stubs-arm.cc	(working copy)
@@ -5730,7 +5730,7 @@
                                     Register hash,
                                     Register character) {
   // hash = character + (character << 10);
-  __ LoadRoot(hash, Heap::kStringHashSeedRootIndex);
+  __ LoadRoot(hash, Heap::kHashSeedRootIndex);
   // Untag smi seed and add the character.
   __ add(hash, character, Operand(hash, LSR, kSmiTagSize));
   // hash += hash << 10;