[debugger] Remove code to predict step-in target.

src/ic/ic.cc

 // Copyright 2012 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/ic/ic.h"
 
 #include "src/accessors.h"
 #include "src/api.h"
 #include "src/arguments.h"
 #include "src/base/bits.h"
@@ skipping 1742 matching lines @@
         }
         NamedStoreHandlerCompiler compiler(isolate(), receiver_map(), holder);
         return compiler.CompileStoreCallback(receiver, lookup->name(), info);
       } else if (accessors->IsAccessorPair()) {
         Handle<Object> setter(Handle<AccessorPair>::cast(accessors)->setter(),
                               isolate());
         if (!setter->IsJSFunction()) {
           TRACE_GENERIC_IC(isolate(), "StoreIC", "setter not a function");
           break;
         }
-        // When debugging we need to go the slow path to flood the accessor.
-        if (GetSharedFunctionInfo()->HasDebugInfo()) break;
         Handle<JSFunction> function = Handle<JSFunction>::cast(setter);
         CallOptimization call_optimization(function);
         NamedStoreHandlerCompiler compiler(isolate(), receiver_map(), holder);
         if (call_optimization.is_simple_api_call() &&
             call_optimization.IsCompatibleReceiver(receiver, holder)) {
           return compiler.CompileStoreCallback(receiver, lookup->name(),
                                                call_optimization,
                                                lookup->GetAccessorIndex());
         }
         int expected_arguments =
@@ skipping 1203 matching lines @@
     KeyedLoadICNexus nexus(vector, vector_slot);
     KeyedLoadIC ic(IC::EXTRA_CALL_FRAME, isolate, &nexus);
     ic.UpdateState(receiver, key);
     ASSIGN_RETURN_FAILURE_ON_EXCEPTION(isolate, result, ic.Load(receiver, key));
   }
 
   return *result;
 }
 }  // namespace internal
 }  // namespace v8