Delete some unused code found by -Wunused-function

chrome/browser/chrome_browser_main.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/chrome_browser_main.h"
 
 #include <algorithm>
 #include <string>
 #include <vector>
 
@@ skipping 450 matching lines @@
   StartupBrowserCreator::ProcessCommandLineAlreadyRunning(
       command_line, current_directory);
   return true;
 }
 
 bool HasImportSwitch(const CommandLine& command_line) {
   return (command_line.HasSwitch(switches::kImport) ||
           command_line.HasSwitch(switches::kImportFromFile));
 }
 
+#if defined(ENABLE_RLZ)
 bool IsGoogleUrl(const GURL& url) {
   return google_util::IsGoogleHomePageUrl(url.possibly_invalid_spec());
 }
+#endif
 
 }  // namespace
 
 namespace chrome_browser {
 // This error message is not localized because we failed to load the
 // localization data files.
 const char kMissingLocaleDataTitle[] = "Missing File Error";
 const char kMissingLocaleDataMessage[] =
     "Unable to find locale data files. Please reinstall.";
 }  // namespace chrome_browser
@@ skipping 1147 matching lines @@
     if (base::win::GetVersion() <= base::win::VERSION_XP)
       uma_name += "_XP";
 
     uma_name += "_PreRead_";
     uma_name += pre_read_percentage;
     AddPreReadHistogramTime(uma_name.c_str(), time);
   }
 #endif
 #endif
 }