Added switch --disable-app-list-dismiss-on-blur.

ui/app_list/app_list_switches.cc

Index: ui/app_list/app_list_switches.cc
diff --git a/ui/app_list/app_list_switches.cc b/ui/app_list/app_list_switches.cc
index ec2ea1cf8a3019c8917e46fd62f577042417367e..ea10c7ce1df6f4051dde384ff6f735679e834bc8 100644
--- a/ui/app_list/app_list_switches.cc
+++ b/ui/app_list/app_list_switches.cc
@@ -16,6 +16,11 @@ const char kCustomLauncherPage[] = "custom-launcher-page";
 // If set, the app info context menu item is not available in the app list UI.
 const char kDisableAppInfo[] = "disable-app-list-app-info";
 
+// If set, the app list will not be dismissed when it loses focus. This is
+// useful when testing the app list or a custom launcher page. It can still be
+// dismissed via the other methods (like the Esc key).
+const char kDisableAppListDismissOnBlur[] = "disable-app-list-dismiss-on-blur";
+
 // If set, Drive apps will not be shown side-by-side with Chrome apps.
 const char kDisableDriveAppsInAppList[] = "disable-drive-apps-in-app-list";
 
@@ -76,6 +81,11 @@ bool IsCenteredAppListEnabled() {
          IsExperimentalAppListEnabled();
 }
 
+bool ShouldNotDismissOnBlur() {
+  return CommandLine::ForCurrentProcess()->HasSwitch(
+      kDisableAppListDismissOnBlur);
+}
+
 bool IsDriveAppsInAppListEnabled() {
 #if defined(OS_CHROMEOS)
   return !CommandLine::ForCurrentProcess()->HasSwitch(