Move --custom-launcher-page switch into app_list_switches.h.

chrome/browser/ui/app_list/app_list_view_delegate.cc

Index: chrome/browser/ui/app_list/app_list_view_delegate.cc
diff --git a/chrome/browser/ui/app_list/app_list_view_delegate.cc b/chrome/browser/ui/app_list/app_list_view_delegate.cc
index af012b2907019a935f8a740d7c3db45874cb71fb..06c4ef977d9e16e1a9b4edc3536d42879ec88491 100644
--- a/chrome/browser/ui/app_list/app_list_view_delegate.cc
+++ b/chrome/browser/ui/app_list/app_list_view_delegate.cc
@@ -115,9 +115,9 @@ void GetCustomLauncherPageUrls(content::BrowserContext* browser_context,
   // First, check the command line.
   base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
   if (app_list::switches::IsExperimentalAppListEnabled() &&
-      command_line->HasSwitch(switches::kCustomLauncherPage)) {
-    GURL custom_launcher_page_url(
-        command_line->GetSwitchValueASCII(switches::kCustomLauncherPage));
+      command_line->HasSwitch(app_list::switches::kCustomLauncherPage)) {
+    GURL custom_launcher_page_url(command_line->GetSwitchValueASCII(
+        app_list::switches::kCustomLauncherPage));
 
     if (custom_launcher_page_url.SchemeIs(extensions::kExtensionScheme)) {
       urls->push_back(custom_launcher_page_url);