Protect some definitions in about_flags.cc with #defined(USE_ASH)

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 6deea230cde4c1626bfa2d7edfa7a86318562e32..53a7f033da6e65b9219963c5660fbee56bf9e10e 100644
--- a/chrome/browser/about_flags.cc
+++ b/chrome/browser/about_flags.cc
@@ -370,7 +370,7 @@ const FeatureEntry::Choice kTopChromeMaterialDesignChoices[] = {
     switches::kTopChromeMDMaterialHybrid },
 };
 
-#if defined(OS_CHROMEOS)
+#if defined(USE_ASH)
 const FeatureEntry::Choice kAshMaterialDesignChoices[] = {
     {IDS_GENERIC_EXPERIMENT_CHOICE_DEFAULT, "", ""},
     {IDS_GENERIC_EXPERIMENT_CHOICE_DISABLED, ash::switches::kAshMaterialDesign,
@@ -380,7 +380,9 @@ const FeatureEntry::Choice kAshMaterialDesignChoices[] = {
     {IDS_FLAGS_ASH_MD_EXPERIMENTAL, ash::switches::kAshMaterialDesign,
      ash::switches::kAshMaterialDesignExperimental},
 };
+#endif  // USE_ASH
 
+#if defined(OS_CHROMEOS)
 const FeatureEntry::Choice kAshMaterialDesignInkDropAnimationSpeed[] = {
     {IDS_GENERIC_EXPERIMENT_CHOICE_DEFAULT, "", ""},
     {IDS_FLAGS_MATERIAL_DESIGN_INK_DROP_ANIMATION_FAST,