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

chrome/browser/password_manager/password_manager_util_win.cc

 // Copyright 2013 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.
 
 // windows.h must be first otherwise Win8 SDK breaks.
 #include <windows.h>
 #include <LM.h>
 #include <wincred.h>
 
 // SECURITY_WIN32 must be defined in order to get
@@ skipping 217 matching lines @@
   bool retval = false;
   CREDUI_INFO cui = {};
   WCHAR username[CREDUI_MAX_USERNAME_LENGTH+1] = {};
   WCHAR displayname[CREDUI_MAX_USERNAME_LENGTH+1] = {};
   WCHAR password[CREDUI_MAX_PASSWORD_LENGTH+1] = {};
   DWORD username_length = CREDUI_MAX_USERNAME_LENGTH;
   base::string16 product_name = l10n_util::GetStringUTF16(IDS_PRODUCT_NAME);
   base::string16 password_prompt =
       l10n_util::GetStringUTF16(IDS_PASSWORDS_PAGE_AUTHENTICATION_PROMPT);
   HANDLE handle = INVALID_HANDLE_VALUE;
-  int tries = 0;
+  size_t tries = 0;
   bool use_displayname = false;
   bool use_principalname = false;
   DWORD logon_result = 0;
 
   // Disable password manager reauthentication before Windows 7.
   // This is because of an interaction between LogonUser() and the sandbox.
   // http://crbug.com/345916
   if (base::win::GetVersion() < base::win::VERSION_WIN7)
     return true;
 
@@ skipping 68 matching lines @@
         }
       }
       SecureZeroMemory(password, sizeof(password));
     }
   } while (credErr == NO_ERROR &&
            (retval == false && tries < kMaxPasswordRetries));
   return retval;
 }
 
 }  // namespace password_manager_util_win