Don't allow Chrome to go into background mode when launched by GCF.

chrome_frame/chrome_frame_automation.cc

Index: chrome_frame/chrome_frame_automation.cc
diff --git a/chrome_frame/chrome_frame_automation.cc b/chrome_frame/chrome_frame_automation.cc
index e120f14ca7a0a7d8903e4ec9481b09e36be7465e..24159322b72cfafec7293767311c6fb6672276f4 100644
--- a/chrome_frame/chrome_frame_automation.cc
+++ b/chrome_frame/chrome_frame_automation.cc
@@ -263,6 +263,10 @@ void AutomationProxyCacheEntry::CreateProxy(ChromeFrameLaunchParams* params,
     // Chrome Frame never wants Chrome to start up with a First Run UI.
     command_line->AppendSwitch(switches::kNoFirstRun);
 
+    // Chrome Frame never wants to run background extensions since they
+    // interfere with in-use updates.
+    command_line->AppendSwitch(switches::kDisableBackgroundMode);
+
     command_line->AppendSwitch(switches::kDisablePopupBlocking);
 
     // Disable the "Whoa! Chrome has crashed." dialog, because that isn't very