Resolve the conflict that auto-launch has with the background mode feature (part 1).

chrome/installer/setup/install.cc

Index: chrome/installer/setup/install.cc
===================================================================
--- chrome/installer/setup/install.cc	(revision 132169)
+++ chrome/installer/setup/install.cc	(working copy)
@@ -451,9 +451,10 @@
             &auto_launch_chrome);
         if (auto_launch_chrome) {
           auto_launch_util::SetWillLaunchAtLogin(
-              true,
               installer_state.target_path(),
-              ASCIIToUTF16(chrome::kInitialProfile));
+              ASCIIToUTF16(chrome::kInitialProfile),
+              auto_launch_util::FLAG_ENABLE,     // Auto start.
+              auto_launch_util::FLAG_PRESERVE);  // Background mode.
         }
       }
     }