Bug 511320 - When FIPS mode change fails, inform the user. r=kaie

security/manager/locales/en-US/chrome/pippki/pippki.properties

@@ -151,6 +151,7 @@ devinfo_stat_ready=Ready
 enable_fips=Enable FIPS
 disable_fips=Disable FIPS
 fips_nonempty_password_required=FIPS mode requires that you have a Master Password set for each security device. Please set the password before trying to enable FIPS mode.
+unable_to_toggle_fips=Unable to change the FIPS mode for the security device. It is recommended that you exit and restart this application.
 
 # CRL next update.
 crlNextUpdateMsg1=%S cannot establish an encrypted connection with "%S".

security/manager/pki/resources/content/device_manager.js

@@ -386,8 +386,7 @@ function doLogin()
                        bundle.GetStringFromName("devinfo_stat_notloggedin"));
     }
   } catch (e) {
-    var alertStr = bundle.GetStringFromName("login_failed"); 
-    doPrompt(alertStr);
+    doPrompt(bundle.GetStringFromName("login_failed"));
   }
   enableButtons();
 }
@@ -541,8 +540,15 @@ function toggleFIPS()
         return;
     }
   }
-  
-  secmoddb.toggleFIPSMode();
+
+  try {
+    secmoddb.toggleFIPSMode();
+  }
+  catch (e) {
+    doPrompt(bundle.GetStringFromName("unable_to_toggle_FIPS"));
+    return;
+  }
+
   //Remove the existing listed modules so that re-fresh doesn't 
   //display the module that just changed.
   ClearDeviceList();