Changed GenerateKeyword to always return keyword in lowercase

components/search_engines/template_url.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/search_engines/template_url.h"
 
 #include <string>
 #include <vector>
 
 #include "base/command_line.h"
 #include "base/format_macros.h"
+#include "base/i18n/case_conversion.h"
 #include "base/i18n/icu_string_conversions.h"
 #include "base/i18n/rtl.h"
 #include "base/logging.h"
 #include "base/macros.h"
 #include "base/metrics/field_trial.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_piece.h"
 #include "base/strings/string_split.h"
 #include "base/strings/string_util.h"
 #include "base/strings/stringprintf.h"
@@ skipping 1169 matching lines @@
   DCHECK(url.is_valid());
   // Strip "www." off the front of the keyword; otherwise the keyword won't work
   // properly.  See http://code.google.com/p/chromium/issues/detail?id=6984 .
   // |url|'s hostname may be IDN-encoded. Before generating |keyword| from it,
   // convert to Unicode, so it won't look like a confusing punycode string.
   base::string16 keyword = url_formatter::StripWWW(
       url_formatter::IDNToUnicode(url.host()));
   // Special case: if the host was exactly "www." (not sure this can happen but
   // perhaps with some weird intranet and custom DNS server?), ensure we at
   // least don't return the empty string.
-  return keyword.empty() ? base::ASCIIToUTF16("www") : keyword;
+  return keyword.empty() ? base::ASCIIToUTF16("www")
+                         : base::i18n::ToLower(keyword);
 }
 
 // static
 GURL TemplateURL::GenerateFaviconURL(const GURL& url) {
   DCHECK(url.is_valid());
   GURL::Replacements rep;
 
   const char favicon_path[] = "/favicon.ico";
   int favicon_path_len = arraysize(favicon_path) - 1;
 
@@ skipping 308 matching lines @@
       // patterns. This means that given patterns
       //    [ "http://foo/#q={searchTerms}", "http://foo/?q={searchTerms}" ],
       // calling ExtractSearchTermsFromURL() on "http://foo/?q=bar#q=' would
       // return false. This is important for at least Google, where such URLs
       // are invalid.
       return !search_terms->empty();
     }
   }
   return false;
 }