Correct r17804 to match latest version of uploaded CL

src/arm/macro-assembler-arm.cc

Index: src/arm/macro-assembler-arm.cc
diff --git a/src/arm/macro-assembler-arm.cc b/src/arm/macro-assembler-arm.cc
index cd416e4bc9d4c032e98f6afc6bd1dee4cdb1e15d..ad5bd76a60c5e5317d0431439d921f5fabc68928 100644
--- a/src/arm/macro-assembler-arm.cc
+++ b/src/arm/macro-assembler-arm.cc
@@ -1500,6 +1500,9 @@ void MacroAssembler::CheckAccessGlobalProxy(Register holder_reg,
 }
 
 
+// Compute the hash code from the untagged key.  This must be kept in sync with
+// ComputeIntegerHash in utils.h and KeyedLoadGenericElementStub in
+// code-stub-hydrogen.cc
 void MacroAssembler::GetNumberHash(Register t0, Register scratch) {
   // First of all we assign the hash seed to scratch.
   LoadRoot(scratch, Heap::kHashSeedRootIndex);