Remove extranous holder load in some prototype-chain checking cases

src/arm/lithium-arm.h

Index: src/arm/lithium-arm.h
diff --git a/src/arm/lithium-arm.h b/src/arm/lithium-arm.h
index 207faf46e0adf3acb31520ca129bf4b3e504cfa2..cc979488321b9e6943fb0dbe8e789883222328ae 100644
--- a/src/arm/lithium-arm.h
+++ b/src/arm/lithium-arm.h
@@ -2239,7 +2239,7 @@ class LCheckMaps: public LTemplateInstruction<0, 1, 0> {
 };
 
 
-class LCheckPrototypeMaps: public LTemplateInstruction<1, 0, 2> {
+class LCheckPrototypeMaps: public LTemplateInstruction<0, 0, 2> {
  public:
   LCheckPrototypeMaps(LOperand* temp, LOperand* temp2)  {
     temps_[0] = temp;