Use base::StartWith() in more places when appropriate.

components/autofill/core/browser/autofill_profile_comparator.cc

 // Copyright 2016 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 "components/autofill/core/browser/autofill_profile_comparator.h"
 
 #include <algorithm>
 #include <vector>
 
 #include "base/i18n/case_conversion.h"
@@ skipping 291 matching lines @@
   VLOG(1) << "n1 = {" << n1 << "}";
   VLOG(1) << "n2 = {" << n2 << "}";
   VLOG(1) << "merged_number = {" << merged_number << "}";
   VLOG(1) << "new_number = \"" << new_number << "\"";
 
   // Check if it's a North American number that's missing the area code.
   // Libphonenumber doesn't know how to format short numbers; it will still
   // include the country code prefix.
   if (merged_number.country_code() == 1 &&
       merged_number.national_number() <= 9999999 &&
-      new_number.find("+1") == 0) {
+      base::StartsWith(new_number, "+1", base::CompareCase::SENSITIVE)) {
     size_t offset = 2;  // The char just after "+1".
     while (offset < new_number.size() &&
            base::IsAsciiWhitespace(new_number[offset])) {
       ++offset;
     }
     new_number = new_number.substr(offset);
   }
 
   phone_number->SetRawInfo(kWholePhoneNumber, UTF8ToUTF16(new_number));
 
@@ skipping 418 matching lines @@
   const base::string16& address2 = rewriter.Rewrite(NormalizeForComparison(
       p2.GetInfo(AutofillType(ADDRESS_HOME_STREET_ADDRESS), app_locale_)));
   if (CompareTokens(address1, address2) == DIFFERENT_TOKENS) {
     return false;
   }
 
   return true;
 }
 
 }  // namespace autofill