Improve handling of property loads on the proto chain.

src/mips/lithium-mips.h

Index: src/mips/lithium-mips.h
diff --git a/src/mips/lithium-mips.h b/src/mips/lithium-mips.h
index 3a9aa7accfbe4c2ee8c16561adb39dfa1b877437..ef425fc571c7047052ccf7fce126150b26b34bdf 100644
--- a/src/mips/lithium-mips.h
+++ b/src/mips/lithium-mips.h
@@ -2115,7 +2115,7 @@ 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;