Improve handling of property loads on the proto chain.

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 fb36fe9c0d9dc9191b49b8f23d792a5250bcf01d..4f2a301e3453c7db37153fd4ec2b7d345232d84d 100644
--- a/src/arm/lithium-arm.h
+++ b/src/arm/lithium-arm.h
@@ -2134,7 +2134,7 @@ class LCheckMaps: public LTemplateInstruction<0, 1, 0> {
 };
 
 
-class LCheckPrototypeMaps: public LTemplateInstruction<0, 0, 2> {
+class LCheckPrototypeMaps: public LTemplateInstruction<1, 0, 2> {
  public:
   LCheckPrototypeMaps(LOperand* temp, LOperand* temp2)  {
     temps_[0] = temp;