Change installer log for Chromium to chromium_installer.log

chrome/installer/util/logging_installer.cc

 // Copyright (c) 2011 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 <windows.h>
 #include <stdint.h>
 
 #include "chrome/installer/util/logging_installer.h"
 
 #include "base/command_line.h"
@@ skipping 97 matching lines @@
   installer_logging_ = false;
 }
 
 base::FilePath GetLogFilePath(const installer::MasterPreferences& prefs) {
   std::string path;
   prefs.GetString(installer::master_preferences::kLogFile, &path);
   if (!path.empty())
     return base::FilePath(base::UTF8ToWide(path));
 
   static const base::FilePath::CharType kLogFilename[] =
+#if defined(GOOGLE_CHROME_BUILD)
       FILE_PATH_LITERAL("chrome_installer.log");
+#else  // CHROMIUM_BUILD
+      FILE_PATH_LITERAL("chromium_installer.log");
+#endif
 
   // Fallback to current directory if getting the temp directory fails.
   base::FilePath tmp_path;
   ignore_result(PathService::Get(base::DIR_TEMP, &tmp_path));
   return tmp_path.Append(kLogFilename);
 }
 
 }  // namespace installer