Add flags for CrOS Component using Feature API

chrome/browser/about_flags.cc

Index: chrome/browser/about_flags.cc
diff --git a/chrome/browser/about_flags.cc b/chrome/browser/about_flags.cc
index b0944a345e5e18b8daf694575cfae03ae31f4e0d..d4c3977e4eca59cf9357b57a12d52b961d1264a2 100644
--- a/chrome/browser/about_flags.cc
+++ b/chrome/browser/about_flags.cc
@@ -2303,6 +2303,9 @@ const FeatureEntry kFeatureEntries[] = {
     {"disable-native-cups", flag_descriptions::kDisableNativeCupsName,
      flag_descriptions::kDisableNativeCupsDescription, kOsCrOS,
      SINGLE_VALUE_TYPE(switches::kDisableNativeCups)},
+    {"cros-component", flag_descriptions::kCrOSComponentName,

[skau, 2017/05/03 21:07:49]

You want this to say enable-cros-component so it's easy to tell what the default
state is.

[xiaochu, 2017/05/03 23:40:28]

Done.

+     flag_descriptions::kCrOSComponentDescription, kOsCrOS,
+     FEATURE_VALUE_TYPE(features::kCrOSComponent)},
     {"enable-encryption-migration",
      flag_descriptions::kEnableEncryptionMigrationName,
      flag_descriptions::kEnableEncryptionMigrationDescription, kOsCrOS,