[Autofill] Fix of crashes caused by show-autofill-signatures flag

components/autofill/core/common/autofill_util.cc

 // Copyright 2015 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/common/autofill_util.h"
 
 #include <algorithm>
 
 #include "base/command_line.h"
 #include "base/i18n/case_conversion.h"
@@ skipping 24 matching lines @@
   bool case_sensitive_;
 };
 
 }  // namespace
 
 bool IsFeatureSubstringMatchEnabled() {
   return base::CommandLine::ForCurrentProcess()->HasSwitch(
       switches::kEnableSuggestionsWithSubstringMatch);
 }
 
+bool IsShowAutofillSignaturesEnabled() {
+  return base::CommandLine::ForCurrentProcess()->HasSwitch(
+      switches::kShowAutofillSignatures);
+}
+
 bool IsKeyboardAccessoryEnabled() {
 #if defined(OS_ANDROID)
   return base::CommandLine::ForCurrentProcess()->HasSwitch(
              switches::kEnableAccessorySuggestionView) ||
          (base::FieldTrialList::FindFullName("AutofillKeyboardAccessory") ==
               "Enabled" &&
           !base::CommandLine::ForCurrentProcess()->HasSwitch(
               switches::kDisableAccessorySuggestionView));
 #else  // !defined(OS_ANDROID)
   return false;
@@ skipping 77 matching lines @@
 }
 
 std::vector<std::string> LowercaseAndTokenizeAttributeString(
     const std::string& attribute) {
   return base::SplitString(base::ToLowerASCII(attribute),
                            base::kWhitespaceASCII, base::TRIM_WHITESPACE,
                            base::SPLIT_WANT_NONEMPTY);
 }
 
 }  // namespace autofill