Revert of Remove some legacy versions of StartsWith and EndsWith.

dbus/string_util.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "dbus/string_util.h"
 
 #include "base/strings/string_util.h"
 
 namespace dbus {
 
-// This implementation is based upon D-Bus Specification Version 0.19.
 bool IsValidObjectPath(const std::string& value) {
+  // This implementation is based upon D-Bus Specification Version 0.19.
+
+  const bool kCaseSensitive = true;
+
   // A valid object path begins with '/'.
-  if (!base::StartsWith(value, "/", base::CompareCase::SENSITIVE))
+  if (!base::StartsWithASCII(value, "/", kCaseSensitive))
     return false;
 
   // Elements are pieces delimited by '/'. For instance, "org", "chromium",
   // "Foo" are elements of "/org/chromium/Foo".
   int element_length = 0;
   for (size_t i = 1; i < value.size(); ++i) {
     const char c = value[i];
     if (c == '/') {
       // No element may be the empty string.
       if (element_length == 0)
         return false;
       element_length = 0;
     } else {
       // Each element must only contain "[A-Z][a-z][0-9]_".
       const bool is_valid_character =
           ('A' <= c && c <= 'Z') || ('a' <= c && c <= 'z') ||
           ('0' <= c && c <= '9') || c == '_';
       if (!is_valid_character)
         return false;
       element_length++;
     }
   }
 
   // A trailing '/' character is not allowed unless the path is the root path.
-  if (value.size() > 1 &&
-      base::EndsWith(value, "/", base::CompareCase::SENSITIVE))
+  if (value.size() > 1 && base::EndsWith(value, "/", kCaseSensitive))
     return false;
 
   return true;
 }
 
 }  // namespace dbus