Update some uses of char16 to use the base:: namespace.

chrome/browser/autocomplete/extension_app_provider.cc

 // Copyright (c) 2012 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 "chrome/browser/autocomplete/extension_app_provider.h"
 
 #include <algorithm>
 #include <cmath>
 
 #include "base/strings/string16.h"
@@ skipping 100 matching lines @@
   if (input.text().empty())
     return;
 
   for (ExtensionApps::const_iterator app = extension_apps_.begin();
        app != extension_apps_.end(); ++app) {
     // See if the input matches this extension application.
     const base::string16& name = app->name;
     base::string16::const_iterator name_iter =
         std::search(name.begin(), name.end(),
                     input.text().begin(), input.text().end(),
-                    base::CaseInsensitiveCompare<char16>());
+                    base::CaseInsensitiveCompare<base::char16>());
     bool matches_name = name_iter != name.end();
     size_t name_match_index = matches_name ?
         static_cast<size_t>(name_iter - name.begin()) : base::string16::npos;
 
     bool matches_url = false;
     size_t url_match_index = base::string16::npos;
     if (app->should_match_against_launch_url) {
       const base::string16& url = app->launch_url;
       base::string16::const_iterator url_iter =
           std::search(url.begin(), url.end(),
                       input.text().begin(), input.text().end(),
-                      base::CaseInsensitiveCompare<char16>());
+                      base::CaseInsensitiveCompare<base::char16>());
       matches_url = url_iter != url.end() &&
           input.type() != AutocompleteInput::FORCED_QUERY;
       url_match_index = matches_url ?
           static_cast<size_t>(url_iter - url.begin()) : base::string16::npos;
     }
 
     if (matches_name || matches_url) {
       // We have a match, might be a partial match.
       matches_.push_back(CreateAutocompleteMatch(
           input, *app, name_match_index, url_match_index));
@@ skipping 75 matching lines @@
     history::URLRow info;
     url_db->GetRowForURL(url, &info);
     type_count_boost =
         400 * (1.0 - (std::pow(static_cast<double>(2), -info.typed_count())));
   }
   int relevance = 575 + static_cast<int>(type_count_boost) +
                         static_cast<int>(fraction_boost);
   DCHECK_LE(relevance, kMaxRelevance);
   return relevance;
 }