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diff --git a/deps/v8/src/code-stubs.h b/deps/v8/src/code-stubs.h
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+// Copyright 2006-2008 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
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#ifndef V8_CODE_STUBS_H_
+#define V8_CODE_STUBS_H_
+
+namespace v8 { namespace internal {
+
+
+// Stub is base classes of all stubs.
+class CodeStub BASE_EMBEDDED {
+ public:
+  enum Major {
+    CallFunction,
+    GenericBinaryOp,
+    SmiOp,
+    Compare,
+    RecordWrite,  // Last stub that allows stub calls inside.
+    StackCheck,
+    UnarySub,
+    RevertToNumber,
+    ToBoolean,
+    Instanceof,
+    CounterOp,
+    ArgumentsAccess,
+    Runtime,
+    CEntry,
+    JSEntry,
+    GetProperty,   // ARM only
+    SetProperty,   // ARM only
+    InvokeBuiltin,  // ARM only
+    JSExit,        // ARM only
+    NUMBER_OF_IDS
+  };
+
+  // Retrieve the code for the stub. Generate the code if needed.
+  Handle<Code> GetCode();
+
+  static Major MajorKeyFromKey(uint32_t key) {
+    return static_cast<Major>(MajorKeyBits::decode(key));
+  };
+  static int MinorKeyFromKey(uint32_t key) {
+    return MinorKeyBits::decode(key);
+  };
+  static const char* MajorName(Major major_key);
+
+  virtual ~CodeStub() {}
+
+ protected:
+  static const int kMajorBits = 5;
+  static const int kMinorBits = kBitsPerPointer - kMajorBits - kSmiTagSize;
+
+ private:
+  // Generates the assembler code for the stub.
+  virtual void Generate(MacroAssembler* masm) = 0;
+
+  // Returns information for computing the number key.
+  virtual Major MajorKey() = 0;
+  virtual int MinorKey() = 0;
+
+  // Returns a name for logging/debugging purposes.
+  virtual const char* GetName() { return MajorName(MajorKey()); }
+
+#ifdef DEBUG
+  virtual void Print() { PrintF("%s\n", GetName()); }
+#endif
+
+  // Computes the key based on major and minor.
+  uint32_t GetKey() {
+    ASSERT(static_cast<int>(MajorKey()) < NUMBER_OF_IDS);
+    return MinorKeyBits::encode(MinorKey()) |
+           MajorKeyBits::encode(MajorKey());
+  }
+
+  bool AllowsStubCalls() { return MajorKey() <= RecordWrite; }
+
+  class MajorKeyBits: public BitField<uint32_t, 0, kMajorBits> {};
+  class MinorKeyBits: public BitField<uint32_t, kMajorBits, kMinorBits> {};
+
+  friend class BreakPointIterator;
+};
+
+} }  // namespace v8::internal
+
+#endif  // V8_CODE_STUBS_H_