Revert "Continued fix for 351257. Reusing the feedback vector is too complex."

src/hydrogen.cc

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 7188 matching lines @@
       return false;
     }
     if (target_shared->scope_info() == ScopeInfo::Empty(isolate())) {
       // The scope info might not have been set if a lazily compiled
       // function is inlined before being called for the first time.
       Handle<ScopeInfo> target_scope_info =
           ScopeInfo::Create(target_info.scope(), zone());
       target_shared->set_scope_info(*target_scope_info);
     }
     target_shared->EnableDeoptimizationSupport(*target_info.code());
-    target_shared->set_feedback_vector(*target_info.feedback_vector());
     Compiler::RecordFunctionCompilation(Logger::FUNCTION_TAG,
                                         &target_info,
                                         target_shared);
   }
 
   // ----------------------------------------------------------------
   // After this point, we've made a decision to inline this function (so
   // TryInline should always return true).
 
   // Type-check the inlined function.
@@ skipping 4066 matching lines @@
   if (ShouldProduceTraceOutput()) {
     isolate()->GetHTracer()->TraceHydrogen(name(), graph_);
   }
 
 #ifdef DEBUG
   graph_->Verify(false);  // No full verify.
 #endif
 }
 
 } }  // namespace v8::internal