[VK] Add feature flag for keyboard settings UI tweak.

Bug: 876901
Change-Id: Ic8a37a79fe8bd41606f6be2ef5e5e2e6bc268e7e
Reviewed-on: https://chromium-review.googlesource.com/c/1341738Reviewed-by: Scott Violet <sky@chromium.org>
Commit-Queue: Darren Shen <shend@chromium.org>
Cr-Commit-Position: refs/heads/master@{#609519}

ui/base/ui_base_features.cc

@@ -43,6 +43,11 @@ const base::Feature kEnableVirtualKeyboardUkm = {
 const base::Feature kExperimentalUi{"ExperimentalUi",
                                     base::FEATURE_DISABLED_BY_DEFAULT};
 
+// Update of the virtual keyboard settings UI as described in
+// https://crbug.com/876901.
+const base::Feature kInputMethodSettingsUiUpdate = {
+    "InputMethodSettingsUiUpdate", base::FEATURE_DISABLED_BY_DEFAULT};
+
 // Allows system keyboard event capture when |features::kKeyboardLockApi| is on.
 const base::Feature kSystemKeyboardLock{"SystemKeyboardLock",
                                         base::FEATURE_ENABLED_BY_DEFAULT};

ui/base/ui_base_features.h

@@ -19,6 +19,7 @@ UI_BASE_EXPORT extern const base::Feature
 UI_BASE_EXPORT extern const base::Feature kEnableStylusVirtualKeyboard;
 UI_BASE_EXPORT extern const base::Feature kEnableVirtualKeyboardUkm;
 UI_BASE_EXPORT extern const base::Feature kExperimentalUi;
+UI_BASE_EXPORT extern const base::Feature kInputMethodSettingsUiUpdate;
 UI_BASE_EXPORT extern const base::Feature kSystemKeyboardLock;
 UI_BASE_EXPORT extern const base::Feature kTouchableAppContextMenu;
 UI_BASE_EXPORT extern const base::Feature kNotificationIndicator;