Revert of Change base::Value::ListStorage to std::vector<base::Value>

ios/chrome/browser/autofill/autofill_agent.mm

Index: ios/chrome/browser/autofill/autofill_agent.mm
diff --git a/ios/chrome/browser/autofill/autofill_agent.mm b/ios/chrome/browser/autofill/autofill_agent.mm
index 651542f4bf5261dc4587bb8f8a36ab2918170c06..db8e6ab11986afa49153eaa491ad578c92d70a56 100644
--- a/ios/chrome/browser/autofill/autofill_agent.mm
+++ b/ios/chrome/browser/autofill/autofill_agent.mm
@@ -267,7 +267,7 @@
   if (field.GetList("option_values", &optionValues)) {
     for (const auto& optionValue : *optionValues) {
       base::string16 value;
-      if (optionValue.GetAsString(&value))
+      if (optionValue->GetAsString(&value))
         fieldData->option_values.push_back(value);
     }
   }
@@ -277,7 +277,7 @@
   if (field.GetList("option_contents", &optionContents)) {
     for (const auto& optionContent : *optionContents) {
       base::string16 content;
-      if (optionContent.GetAsString(&content))
+      if (optionContent->GetAsString(&content))
         fieldData->option_contents.push_back(content);
     }
   }
@@ -365,7 +365,7 @@
   for (const auto& formDict : *formsList) {
     // Each form list entry should be a JSON dictionary.
     const base::DictionaryValue* formData;
-    if (!formDict.GetAsDictionary(&formData))
+    if (!formDict->GetAsDictionary(&formData))
       return NO;
 
     // Form data is copied into a FormData object field-by-field.
@@ -404,7 +404,7 @@
     for (const auto& fieldDict : *fieldsList) {
       const base::DictionaryValue* field;
       autofill::FormFieldData fieldData;
-      if (fieldDict.GetAsDictionary(&field) &&
+      if (fieldDict->GetAsDictionary(&field) &&
           [self extractFormField:*field asFieldData:&fieldData]) {
         form.fields.push_back(fieldData);
       } else {