[debugger] Move clearing of optimized code map out of GC.

src/heap/objects-visiting-inl.h

 // 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.
 
 #ifndef V8_OBJECTS_VISITING_INL_H_
 #define V8_OBJECTS_VISITING_INL_H_
 
 #include "src/heap/array-buffer-tracker.h"
 #include "src/heap/objects-visiting.h"
 #include "src/ic/ic-state.h"
@@ skipping 454 matching lines @@
       // the decision until we see all functions that point to the same
       // SharedFunctionInfo because some of them might be optimized.
       // That would also make the non-optimized version of the code
       // non-flushable, because it is required for bailing out from
       // optimized code.
       collector->code_flusher()->AddCandidate(shared);
       // Treat the reference to the code object weakly.
       VisitSharedFunctionInfoWeakCode(heap, object);
       return;
     }
-  } else {
-    // TODO(mstarzinger): Drop this case, it shouldn't be done here!
-    if (!shared->optimized_code_map()->IsSmi()) {
-      // Flush optimized code map on major GCs without code flushing,
-      // needed because cached code doesn't contain breakpoints.
-      shared->ClearOptimizedCodeMap();
-    }
   }
   VisitSharedFunctionInfoStrongCode(heap, object);
 }
 
 
 template <typename StaticVisitor>
 void StaticMarkingVisitor<StaticVisitor>::VisitJSFunction(Map* map,
                                                           HeapObject* object) {
   Heap* heap = map->GetHeap();
   JSFunction* function = JSFunction::cast(object);
@@ skipping 407 matching lines @@
 
   RelocIterator it(this, mode_mask);
   for (; !it.done(); it.next()) {
     it.rinfo()->template Visit<StaticVisitor>(heap);
   }
 }
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_OBJECTS_VISITING_INL_H_