Added --custom-launcher-page. Adds a page to the experimental launcher.

ui/app_list/test/app_list_test_view_delegate.cc

Index: ui/app_list/test/app_list_test_view_delegate.cc
diff --git a/ui/app_list/test/app_list_test_view_delegate.cc b/ui/app_list/test/app_list_test_view_delegate.cc
index e1380b693e1a1da94feb6f30e775c9bc6b8621e9..e4044b46c6476ab9321905a64ebf6b522b36aedc 100644
--- a/ui/app_list/test/app_list_test_view_delegate.cc
+++ b/ui/app_list/test/app_list_test_view_delegate.cc
@@ -96,6 +96,10 @@ views::View* AppListTestViewDelegate::CreateStartPageWebView(
     const gfx::Size& size) {
   return NULL;
 }
+views::View* AppListTestViewDelegate::CreateCustomPageWebView(
+    const gfx::Size& size) {
+  return NULL;
+}
 #endif
 
 bool AppListTestViewDelegate::IsSpeechRecognitionEnabled() {