MIPS: Turn HCompareHoleAndBranch into a HUnaryControlInstruction.

Port r16805 (b106027)

BUG=
R=plind44@gmail.com

Review URL: https://codereview.chromium.org/23876029

Patch from Balazs Kilvady <kilvadyb@homejinni.com>.

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@16838 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/mips/lithium-mips.cc

@@ -1657,8 +1657,8 @@ LInstruction* LChunkBuilder::DoCompareObjectEqAndBranch(
 
 LInstruction* LChunkBuilder::DoCompareHoleAndBranch(
     HCompareHoleAndBranch* instr) {
-  LOperand* object = UseRegisterAtStart(instr->object());
-  return new(zone()) LCmpHoleAndBranch(object);
+  LOperand* value = UseRegisterAtStart(instr->value());
+  return new(zone()) LCmpHoleAndBranch(value);
 }