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

chrome_elf/blacklist/blacklist.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.
 
 #include "chrome_elf/blacklist/blacklist.h"
 
 #include <assert.h>
 #include <string.h>
 
 #include <vector>
@@ skipping 225 matching lines @@
   while (blacklist::g_troublesome_dlls[++size] != NULL) {}
 
   return size;
 }
 
 bool IsBlacklistInitialized() {
   return g_blacklist_initialized;
 }
 
 int GetBlacklistIndex(const wchar_t* dll_name) {
-  for (int i = 0; i < kTroublesomeDllsMaxCount && g_troublesome_dlls[i]; ++i) {
+  for (int i = 0;
+       i < static_cast<int>(kTroublesomeDllsMaxCount) && g_troublesome_dlls[i];
+       ++i) {
     if (_wcsicmp(dll_name, g_troublesome_dlls[i]) == 0)
       return i;
   }
   return -1;
 }
 
 bool AddDllToBlacklist(const wchar_t* dll_name) {
   int blacklist_size = BlacklistSize();
   // We need to leave one space at the end for the null pointer.
-  if (blacklist_size + 1 >= kTroublesomeDllsMaxCount)
+  if (blacklist_size + 1 >= static_cast<int>(kTroublesomeDllsMaxCount))
     return false;
   for (int i = 0; i < blacklist_size; ++i) {
     if (!_wcsicmp(g_troublesome_dlls[i], dll_name))
       return true;
   }
 
   // Copy string to blacklist.
   wchar_t* str_buffer = new wchar_t[wcslen(dll_name) + 1];
   wcscpy(str_buffer, dll_name);
 
@@ skipping 180 matching lines @@
       break;
     value_buffer[value_len - 1] = L'\0';
     AddDllToBlacklist(&value_buffer[0]);
   }
 
   ::RegCloseKey(key);
   return;
 }
 
 }  // namespace blacklist