Fix the uppercasing of U+00E7(ç) and U+00F7(÷)

src/runtime/runtime-utils.h

Index: src/runtime/runtime-utils.h
diff --git a/src/runtime/runtime-utils.h b/src/runtime/runtime-utils.h
index 147efed092a742724f66013147e76ee4d1b66d0f..3452bfe073b2eaa296c71c95875ec5101e9464a4 100644
--- a/src/runtime/runtime-utils.h
+++ b/src/runtime/runtime-utils.h
@@ -6,6 +6,7 @@
 #define V8_RUNTIME_RUNTIME_UTILS_H_
 
 #include "src/base/logging.h"
+#include "src/globals.h"
 #include "src/runtime/runtime.h"
 
 namespace v8 {
@@ -167,6 +168,36 @@ static inline ObjectTriple MakeTriple(Object* x, Object* y, Object* z) {
   return result;
 }
 
+const uintptr_t kOneInEveryByte = kUintptrAllBitsSet / 0xFF;
+const uintptr_t kAsciiMask = kOneInEveryByte << 7;
+
+// Given a word and two range boundaries returns a word with high bit
+// set in every byte iff the corresponding input byte was strictly in
+// the range (m, n). All the other bits in the result are cleared.
+// This function is only useful when it can be inlined and the
+// boundaries are statically known.
+// Requires: all bytes in the input word and the boundaries must be
+// ASCII (less than 0x7F).
+static inline uintptr_t AsciiRangeMask(uintptr_t w, char m, char n) {
+  // Use strict inequalities since in edge cases the function could be
+  // further simplified.
+  DCHECK(0 < m && m < n);
+  // Has high bit set in every w byte less than n.
+  uintptr_t tmp1 = kOneInEveryByte * (0x7F + n) - w;
+  // Has high bit set in every w byte greater than m.
+  uintptr_t tmp2 = w + kOneInEveryByte * (0x7F - m);
+  return (tmp1 & tmp2 & (kOneInEveryByte * 0x80));
+}
+
+#ifdef DEBUG
+bool CheckFastAsciiConvert(char* dst, const char* src, int length, bool changed,
+                           bool is_to_lower);
+#endif
+
+template <bool is_lower>
+bool FastAsciiConvert(char* dst, const char* src, int length,
+                      bool* changed_out);
+
 }  // namespace internal
 }  // namespace v8