cros: Convert switch to Feature for KSV

This cl converts the Keyboard Shortcut Viewer (KSV) switch to a
base::Feature which is enabled by default.

Bug: 768932, 778874
Test: the feature works properly
Change-Id: I38517d3084f2f493c822d3c435101525d2c98839
Reviewed-on: https://chromium-review.googlesource.com/946550
Reviewed-by: Mitsuru Oshima <[email protected]>
Commit-Queue: Tao Wu <[email protected]>
Cr-Commit-Position: refs/heads/master@{#540584}
diff --git a/chrome/browser/about_flags.cc b/chrome/browser/about_flags.cc
index f1ffdd7..5e3665d 100644
--- a/chrome/browser/about_flags.cc
+++ b/chrome/browser/about_flags.cc
@@ -3426,8 +3426,7 @@
      flag_descriptions::kEnableManualFallbacksFillingName,
      flag_descriptions::kEnableManualFallbacksFillingDescription,
      kOsDesktop | kOsAndroid,
-     FEATURE_VALUE_TYPE(
-         password_manager::features::kManualFallbacksFilling)},
+     FEATURE_VALUE_TYPE(password_manager::features::kManualFallbacksFilling)},
 
 #if !defined(OS_ANDROID)
     {"voice-search-on-local-ntp", flag_descriptions::kVoiceSearchOnLocalNtpName,
@@ -3615,7 +3614,7 @@
     {"ash-enable-keyboard-shortcut-viewer",
      flag_descriptions::kAshEnableKeyboardShortcutViewerName,
      flag_descriptions::kAshEnableKeyboardShortcutViewerDescription, kOsCrOS,
-     SINGLE_VALUE_TYPE(ash::switches::kAshEnableKeyboardShortcutViewer)},
+     FEATURE_VALUE_TYPE(ash::features::kKeyboardShortcutViewer)},
 
     {"ash-disable-login-dim-and-blur",
      flag_descriptions::kAshDisableLoginDimAndBlurName,