Remove premature crankshaft optimization of HasInPrototypeChain.

src/crankshaft/hydrogen.cc

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/crankshaft/hydrogen.h"
 
 #include <sstream>
 
 #include "src/allocation-site-scopes.h"
 #include "src/ast/ast-numbering.h"
@@ skipping 12722 matching lines @@
 
 void HOptimizedGraphBuilder::GenerateMathSqrt(CallRuntime* call) {
   DCHECK(call->arguments()->length() == 1);
   CHECK_ALIVE(VisitForValue(call->arguments()->at(0)));
   HValue* value = Pop();
   HInstruction* result = NewUncasted<HUnaryMathOperation>(value, kMathSqrt);
   return ast_context()->ReturnInstruction(result, call->id());
 }
 
 
-void HOptimizedGraphBuilder::GenerateHasInPrototypeChain(CallRuntime* call) {
-  DCHECK_EQ(2, call->arguments()->length());
-  CHECK_ALIVE(VisitForValue(call->arguments()->at(0)));
-  CHECK_ALIVE(VisitForValue(call->arguments()->at(1)));
-  HValue* prototype = Pop();
-  HValue* object = Pop();
-  HHasInPrototypeChainAndBranch* result =
-      New<HHasInPrototypeChainAndBranch>(object, prototype);
-  return ast_context()->ReturnControl(result, call->id());
-}
-
-
 void HOptimizedGraphBuilder::GenerateFixedArrayGet(CallRuntime* call) {
   DCHECK(call->arguments()->length() == 2);
   CHECK_ALIVE(VisitForValue(call->arguments()->at(0)));
   CHECK_ALIVE(VisitForValue(call->arguments()->at(1)));
   HValue* index = Pop();
   HValue* object = Pop();
   HInstruction* result = New<HLoadKeyed>(
       object, index, nullptr, nullptr, FAST_HOLEY_ELEMENTS, ALLOW_RETURN_HOLE);
   return ast_context()->ReturnInstruction(result, call->id());
 }
@@ skipping 837 matching lines @@
     isolate()->GetHTracer()->TraceHydrogen(name(), graph_);
   }
 
 #ifdef DEBUG
   graph_->Verify(false);  // No full verify.
 #endif
 }
 
 }  // namespace internal
 }  // namespace v8