Post fix of CL "declare a variable before using it"

components/autofill/core/browser/personal_data_manager.cc

 // Copyright 2013 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/personal_data_manager.h"
 
 #include <stddef.h>
 
 #include <algorithm>
 #include <list>
@@ skipping 862 matching lines @@
       unique_matched_profiles, &other_field_types, type.GetStorableType(), 1,
       app_locale_, &labels);
   DCHECK_EQ(unique_suggestions.size(), labels.size());
   for (size_t i = 0; i < labels.size(); i++)
     unique_suggestions[i].label = labels[i];
 
   // Get the profile suggestions limit value set for the current frecency field
   // trial group or SIZE_MAX if no limit is defined.
   std::string limit_str = variations::GetVariationParamValue(
       kFrecencyFieldTrialName, kFrecencyFieldTrialLimitParam);
-  size_t limit;
+  size_t limit = SIZE_MAX;
+  // Reassign SIZE_MAX to |limit| is needed after calling base::StringToSizeT,
+  // as this method can modify |limit| even if it returns false.
   if (!base::StringToSizeT(limit_str, &limit))
     limit = SIZE_MAX;
 
   unique_suggestions.resize(std::min(unique_suggestions.size(), limit));
 
   return unique_suggestions;
 }
 
 // TODO(crbug.com/613187): Investigate if it would be more efficient to dedupe
 // with a vector instead of a list.
@@ skipping 1047 matching lines @@
       existing_profiles->back().SetRawInfo(EMAIL_ADDRESS, email);
 
     AutofillMetrics::LogWalletAddressConversionType(
         AutofillMetrics::CONVERTED_ADDRESS_ADDED);
   }
 
   return guid;
 }
 
 }  // namespace autofill