Fix some case-insensitive cases for StartsWith

components/omnibox/answers_cache.cc

 // Copyright 2014 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/omnibox/answers_cache.h"
 
+#include "base/i18n/case_conversion.h"
 #include "base/strings/string_util.h"
 
 AnswersQueryData::AnswersQueryData() {
 }
 AnswersQueryData::AnswersQueryData(const base::string16& text,
                                    const base::string16& type)
     : full_query_text(text), query_type(type) {
 }
 
 AnswersCache::AnswersCache(size_t max_entries) : max_entries_(max_entries) {
 }
 
 AnswersCache::~AnswersCache() {
 }
 
 AnswersQueryData AnswersCache::GetTopAnswerEntry(const base::string16& query) {
-  base::string16 collapsed_query = base::CollapseWhitespace(query, false);
+  base::string16 collapsed_query = base::i18n::ToLower(
+      base::CollapseWhitespace(query, false));
   for (Cache::iterator it = cache_.begin(); it != cache_.end(); ++it) {
     // If the query text starts with trimmed input, this is valid prefetch data.
-    if (base::StartsWith(it->full_query_text, collapsed_query, false)) {
+    if (base::StartsWith(base::i18n::ToLower(it->full_query_text),
+                         collapsed_query, base::CompareCase::SENSITIVE)) {
       // Move the touched item to the front of the list.
       cache_.splice(cache_.begin(), cache_, it);
       return cache_.front();
     }
   }
   return AnswersQueryData();
 }
 
 void AnswersCache::UpdateRecentAnswers(const base::string16& full_query_text,
                                        const base::string16& query_type) {
   // If this entry is already part of the cache, just update recency.
   for (Cache::iterator it = cache_.begin(); it != cache_.end(); ++it) {
     if (full_query_text == it->full_query_text &&
         query_type == it->query_type) {
       cache_.splice(cache_.begin(), cache_, it);
       return;
     }
   }
 
   // Evict if cache size is exceeded.
   if (cache_.size() >= max_entries_)
     cache_.pop_back();
 
   cache_.push_front(AnswersQueryData(full_query_text, query_type));
 }