clang/win: Let remaining chromium_code targets build with -Wextra.

chrome/browser/web_applications/web_app_win.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/web_applications/web_app_win.h"
 
 #include <shlobj.h>
 
 #include "base/command_line.h"
 #include "base/files/file_enumerator.h"
@@ skipping 572 matching lines @@
       // For Win7+, |in_quick_launch_bar| indicates that we are pinning to
       // taskbar. This needs to be handled by callers.
       creation_locations.in_quick_launch_bar &&
           base::win::CanPinShortcutToTaskbar(),
       ShellUtil::SHORTCUT_LOCATION_QUICK_LAUNCH
     }
   };
 
   BrowserDistribution* dist = BrowserDistribution::GetDistribution();
   // Populate shortcut_paths.
-  for (int i = 0; i < arraysize(locations); ++i) {
+  for (size_t i = 0; i < arraysize(locations); ++i) {
     if (locations[i].use_this_location) {
       base::FilePath path;
       if (!ShellUtil::GetShortcutPath(locations[i].location_id,
                                       dist,
                                       ShellUtil::CURRENT_USER,
                                       &path)) {
         NOTREACHED();
         continue;
       }
       shortcut_paths.push_back(path);
@@ skipping 10 matching lines @@
 
 }  // namespace internals
 
 void UpdateShortcutForTabContents(content::WebContents* web_contents) {
   // UpdateShortcutWorker will delete itself when it's done.
   UpdateShortcutWorker* worker = new UpdateShortcutWorker(web_contents);
   worker->Run();
 }
 
 }  // namespace web_app