Remove the global Strength enum class completely.

src/globals.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_GLOBALS_H_
 #define V8_GLOBALS_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 282 matching lines @@
 
 inline LanguageMode construct_language_mode(bool strict_bit, bool strong_bit) {
   int language_mode = 0;
   if (strict_bit) language_mode |= STRICT_BIT;
   if (strong_bit) language_mode |= STRONG_BIT;
   DCHECK(is_valid_language_mode(language_mode));
   return static_cast<LanguageMode>(language_mode);
 }
 
 
-// Strong mode behaviour must sometimes be signalled by a two valued enum where
-// caching is involved, to prevent sloppy and strict mode from being incorrectly
-// differentiated.
-enum class Strength : bool {
-  WEAK,   // sloppy, strict behaviour
-  STRONG  // strong behaviour
-};
-
-
-inline bool is_strong(Strength strength) {
-  return strength == Strength::STRONG;
-}
-
-
-inline std::ostream& operator<<(std::ostream& os, const Strength& strength) {
-  return os << (is_strong(strength) ? "strong" : "weak");
-}
-
-
-inline Strength strength(LanguageMode language_mode) {
-  return is_strong(language_mode) ? Strength::STRONG : Strength::WEAK;
-}
-
-
-inline size_t hash_value(Strength strength) {
-  return static_cast<size_t>(strength);
-}
-
-
 // Mask for the sign bit in a smi.
 const intptr_t kSmiSignMask = kIntptrSignBit;
 
 const int kObjectAlignmentBits = kPointerSizeLog2;
 const intptr_t kObjectAlignment = 1 << kObjectAlignmentBits;
 const intptr_t kObjectAlignmentMask = kObjectAlignment - 1;
 
 // Desired alignment for pointers.
 const intptr_t kPointerAlignment = (1 << kPointerSizeLog2);
 const intptr_t kPointerAlignmentMask = kPointerAlignment - 1;
@@ skipping 738 matching lines @@
   return static_cast<uint32_t>(bit_cast<uintptr_t>(address) >>
                                kPointerSizeLog2);
 }
 
 }  // namespace internal
 }  // namespace v8
 
 namespace i = v8::internal;
 
 #endif  // V8_GLOBALS_H_