Bump the min-supported OS version in the installer.

chrome/installer/setup/setup_main.cc

Index: chrome/installer/setup/setup_main.cc
diff --git a/chrome/installer/setup/setup_main.cc b/chrome/installer/setup/setup_main.cc
index 34afeaee474098d4c43b4cb548bc32ceee8abf70..42c1c2e623322e7b5cd1eae55490cbf122a21e57 100644
--- a/chrome/installer/setup/setup_main.cc
+++ b/chrome/installer/setup/setup_main.cc
@@ -1697,10 +1697,10 @@ int WINAPI wWinMain(HINSTANCE instance, HINSTANCE prev_instance,
 
   const bool is_uninstall = cmd_line.HasSwitch(installer::switches::kUninstall);
 
-  // Check to make sure current system is WinXP or later. If not, log
+  // Check to make sure current system is Win7 or later. If not, log
   // error message and get out.
   if (!InstallUtil::IsOSSupported()) {
-    LOG(ERROR) << "Chrome only supports Windows XP or later.";
+    LOG(ERROR) << "Chrome only supports Windows 7 or later.";
     installer_state.WriteInstallerResult(
         installer::OS_NOT_SUPPORTED, IDS_INSTALL_OS_NOT_SUPPORTED_BASE, NULL);
     return installer::OS_NOT_SUPPORTED;