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

components/autofill/core/browser/personal_data_manager.cc

Index: components/autofill/core/browser/personal_data_manager.cc
diff --git a/components/autofill/core/browser/personal_data_manager.cc b/components/autofill/core/browser/personal_data_manager.cc
index af62c8548cc24498ae51862960c1190a67bfe488..c1de29ec01614b069540c95eedb520958e501a07 100644
--- a/components/autofill/core/browser/personal_data_manager.cc
+++ b/components/autofill/core/browser/personal_data_manager.cc
@@ -880,7 +880,9 @@ std::vector<Suggestion> PersonalDataManager::GetProfileSuggestions(
   // 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;