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

chrome/browser/shell_integration_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/shell_integration.h"
 
 #include <windows.h>
 #include <shlwapi.h>
 #include <shobjidl.h>
 #include <propkey.h>  // Needs to come after shobjidl.h.
@@ skipping 147 matching lines @@
       NULL
     }, {
       base::DIR_START_MENU,
       NULL
     }, {
       base::DIR_APP_DATA,
       L"Microsoft\\Internet Explorer\\Quick Launch\\User Pinned\\StartMenu"
     }
   };
 
-  for (int i = 0; i < arraysize(kLocations); ++i) {
+  for (size_t i = 0; i < arraysize(kLocations); ++i) {
     base::FilePath path;
     if (!PathService::Get(kLocations[i].location_id, &path)) {
       NOTREACHED();
       continue;
     }
 
     if (kLocations[i].sub_dir)
       path = path.Append(kLocations[i].sub_dir);
 
     bool check_dual_mode = kLocations[i].location_id == base::DIR_START_MENU ||
@@ skipping 506 matching lines @@
   // in the "How would you like to open this?" prompt.
   if (!RegisterBrowser())
     return false;
 
   ResetDefaultBrowser();
 
   base::CommandLine cmdline(base::FilePath(L"openwith.exe"));
   cmdline.AppendArgNative(StartupBrowserCreator::GetDefaultBrowserUrl());
   return base::LaunchProcess(cmdline, base::LaunchOptions()).IsValid();
 }