[crankshaft] Deoptimize if HHasInPrototypeChainAndBranch hits a proxy.

src/crankshaft/mips/lithium-mips.cc

Index: src/crankshaft/mips/lithium-mips.cc
diff --git a/src/crankshaft/mips/lithium-mips.cc b/src/crankshaft/mips/lithium-mips.cc
index 3f03f2abab3488246361dcd3eebd9314ddbf4341..f6577b249d18108f8d2615e2bfe9df251f2928ea 100644
--- a/src/crankshaft/mips/lithium-mips.cc
+++ b/src/crankshaft/mips/lithium-mips.cc
@@ -986,7 +986,9 @@ LInstruction* LChunkBuilder::DoHasInPrototypeChainAndBranch(
     HHasInPrototypeChainAndBranch* instr) {
   LOperand* object = UseRegister(instr->object());
   LOperand* prototype = UseRegister(instr->prototype());
-  return new (zone()) LHasInPrototypeChainAndBranch(object, prototype);
+  LHasInPrototypeChainAndBranch* result =
+      new (zone()) LHasInPrototypeChainAndBranch(object, prototype);
+  return AssignEnvironment(result);
 }