Rename ReverseCondition to CommuteCondition, a more standard term.

src/mips/constants-mips.h

Index: src/mips/constants-mips.h
diff --git a/src/mips/constants-mips.h b/src/mips/constants-mips.h
index a05cb04c83631038a03c7f2cf3e0fa0148523cd2..34d0742162034e959fa03cb8286f3121dd565179 100644
--- a/src/mips/constants-mips.h
+++ b/src/mips/constants-mips.h
@@ -504,7 +504,8 @@ inline Condition NegateCondition(Condition cc) {
 }
 
 
-inline Condition ReverseCondition(Condition cc) {
+// Commute a condition such that a cond b == b cond' b.
+inline Condition CommuteCondition(Condition cc) {
   switch (cc) {
     case Uless:
       return Ugreater;