[deoptimizer] When deoptimizing code, unlink all functions referring to that code.

src/debug/liveedit.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/debug/liveedit.h"
 
 #include "src/assembler-inl.h"
 #include "src/ast/scopes.h"
 #include "src/code-stubs.h"
 #include "src/compilation-cache.h"
@@ skipping 821 matching lines @@
 // Marks code that shares the same shared function info or has inlined
 // code that shares the same function info.
 class DependentFunctionMarker: public OptimizedFunctionVisitor {
  public:
   SharedFunctionInfo* shared_info_;
   bool found_;
 
   explicit DependentFunctionMarker(SharedFunctionInfo* shared_info)
     : shared_info_(shared_info), found_(false) { }
 
-  virtual void EnterContext(Context* context) { }  // Don't care.
-  virtual void LeaveContext(Context* context)  { }  // Don't care.
   virtual void VisitFunction(JSFunction* function) {
     // It should be guaranteed by the iterator that everything is optimized.
     DCHECK(function->code()->kind() == Code::OPTIMIZED_FUNCTION);
     if (function->Inlines(shared_info_)) {
       // Mark the code for deoptimization.
       function->code()->set_marked_for_deoptimization(true);
       found_ = true;
     }
   }
 };
@@ skipping 792 matching lines @@
     scope_info_length++;
 
     current_scope = current_scope->outer_scope();
   }
 
   return scope_info_list;
 }
 
 }  // namespace internal
 }  // namespace v8