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diff --git a/deps/v8/src/parsing/func-name-inferrer.h b/deps/v8/src/parsing/func-name-inferrer.h
new file mode 100644
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+++ b/deps/v8/src/parsing/func-name-inferrer.h
@@ -0,0 +1,127 @@
+// Copyright 2006-2009 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_PARSING_FUNC_NAME_INFERRER_H_
+#define V8_PARSING_FUNC_NAME_INFERRER_H_
+
+#include "src/handles.h"
+#include "src/zone.h"
+
+namespace v8 {
+namespace internal {
+
+class AstRawString;
+class AstString;
+class AstValueFactory;
+class FunctionLiteral;
+
+// FuncNameInferrer is a stateful class that is used to perform name
+// inference for anonymous functions during static analysis of source code.
+// Inference is performed in cases when an anonymous function is assigned
+// to a variable or a property (see test-func-name-inference.cc for examples.)
+//
+// The basic idea is that during parsing of LHSs of certain expressions
+// (assignments, declarations, object literals) we collect name strings,
+// and during parsing of the RHS, a function literal can be collected. After
+// parsing the RHS we can infer a name for function literals that do not have
+// a name.
+class FuncNameInferrer : public ZoneObject {
+ public:
+  FuncNameInferrer(AstValueFactory* ast_value_factory, Zone* zone);
+
+  // To enter function name inference state, put a FuncNameInferrer::State
+  // on the stack.
+  class State {
+   public:
+    explicit State(FuncNameInferrer* fni) : fni_(fni) {
+      if (fni_ != nullptr) fni_->Enter();
+    }
+    ~State() {
+      if (fni_ != nullptr) fni_->Leave();
+    }
+
+   private:
+    FuncNameInferrer* fni_;
+
+    DISALLOW_COPY_AND_ASSIGN(State);
+  };
+
+  // Returns whether we have entered name collection state.
+  bool IsOpen() const { return !entries_stack_.is_empty(); }
+
+  // Pushes an enclosing the name of enclosing function onto names stack.
+  void PushEnclosingName(const AstRawString* name);
+
+  // Pushes an encountered name onto names stack when in collection state.
+  void PushLiteralName(const AstRawString* name);
+
+  void PushVariableName(const AstRawString* name);
+
+  // Adds a function to infer name for.
+  void AddFunction(FunctionLiteral* func_to_infer) {
+    if (IsOpen()) {
+      funcs_to_infer_.Add(func_to_infer, zone());
+    }
+  }
+
+  void RemoveLastFunction() {
+    if (IsOpen() && !funcs_to_infer_.is_empty()) {
+      funcs_to_infer_.RemoveLast();
+    }
+  }
+
+  // Infers a function name and leaves names collection state.
+  void Infer() {
+    DCHECK(IsOpen());
+    if (!funcs_to_infer_.is_empty()) {
+      InferFunctionsNames();
+    }
+  }
+
+ private:
+  enum NameType {
+    kEnclosingConstructorName,
+    kLiteralName,
+    kVariableName
+  };
+  struct Name {
+    Name(const AstRawString* name, NameType type) : name(name), type(type) {}
+    const AstRawString* name;
+    NameType type;
+  };
+
+  void Enter() { entries_stack_.Add(names_stack_.length(), zone()); }
+
+  void Leave() {
+    DCHECK(IsOpen());
+    names_stack_.Rewind(entries_stack_.RemoveLast());
+    if (entries_stack_.is_empty()) funcs_to_infer_.Clear();
+  }
+
+  Zone* zone() const { return zone_; }
+
+  // Constructs a full name in dotted notation from gathered names.
+  const AstString* MakeNameFromStack();
+
+  // A helper function for MakeNameFromStack.
+  const AstString* MakeNameFromStackHelper(int pos,
+                                               const AstString* prev);
+
+  // Performs name inferring for added functions.
+  void InferFunctionsNames();
+
+  AstValueFactory* ast_value_factory_;
+  ZoneList<int> entries_stack_;
+  ZoneList<Name> names_stack_;
+  ZoneList<FunctionLiteral*> funcs_to_infer_;
+  Zone* zone_;
+
+  DISALLOW_COPY_AND_ASSIGN(FuncNameInferrer);
+};
+
+
+}  // namespace internal
+}  // namespace v8
+
+#endif  // V8_PARSING_FUNC_NAME_INFERRER_H_