[strong] Disallow implicit conversions for comparison

src/builtins.h

 // Copyright 2011 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_BUILTINS_H_
 #define V8_BUILTINS_H_
 
 namespace v8 {
 namespace internal {
 
@@ skipping 153 matching lines @@
   V(PlainReturn_LiveEdit,                      BUILTIN, DEBUG_STUB,           \
                                                DEBUG_BREAK)                   \
   V(FrameDropper_LiveEdit,                     BUILTIN, DEBUG_STUB,           \
                                                DEBUG_BREAK)
 
 // Define list of builtins implemented in JavaScript.
 #define BUILTINS_LIST_JS(V)                \
   V(EQUALS, 1)                             \
   V(STRICT_EQUALS, 1)                      \
   V(COMPARE, 2)                            \
+  V(COMPARE_STRONG, 2)                     \
   V(ADD, 1)                                \
   V(ADD_STRONG, 1)                         \
   V(SUB, 1)                                \
   V(SUB_STRONG, 1)                         \
   V(MUL, 1)                                \
   V(MUL_STRONG, 1)                         \
   V(DIV, 1)                                \
   V(DIV_STRONG, 1)                         \
   V(MOD, 1)                                \
   V(MOD_STRONG, 1)                         \
@@ skipping 181 matching lines @@
 
   friend class BuiltinFunctionTable;
   friend class Isolate;
 
   DISALLOW_COPY_AND_ASSIGN(Builtins);
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_BUILTINS_H_