Put implementation of new UI for launcher behind its own flag

Bug: 857195

Change-Id: Id469b5609cde17cf379c421142cedb66fca8e059
Reviewed-on: https://chromium-review.googlesource.com/1117562
Commit-Queue: Weidong Guo <[email protected]>
Reviewed-by: Dan Erat <[email protected]>
Cr-Commit-Position: refs/heads/master@{#570938}
diff --git a/chrome/browser/about_flags.cc b/chrome/browser/about_flags.cc
index 820e5ae..d37ae1e 100644
--- a/chrome/browser/about_flags.cc
+++ b/chrome/browser/about_flags.cc
@@ -3775,6 +3775,11 @@
     {"enable-apps-grid-gap", flag_descriptions::kEnableAppsGridGapFeatureName,
      flag_descriptions::kEnableAppsGridGapFeatureDescription, kOsCrOS,
      FEATURE_VALUE_TYPE(app_list::features::kEnableAppsGridGapFeature)},
+
+    {"enable-new-style-launcher",
+     flag_descriptions::kEnableNewStyleLauncherName,
+     flag_descriptions::kEnableNewStyleLauncherDescription, kOsCrOS,
+     FEATURE_VALUE_TYPE(app_list::features::kEnableNewStyleLauncher)},
 #endif  // OS_CHROMEOS
 
 #if defined(OS_WIN)