[VK] Add enable-virtual-keyboard-md-ui flag definition.

This is used to hide ongoing work to update the virtual keyboard UI.

Bug: 851847
Change-Id: I13001c8812a68341cd9a330958dc4b42dda9abfd
Reviewed-on: https://chromium-review.googlesource.com/1096799
Commit-Queue: Darren Shen <shend@chromium.org>
Reviewed-by: Sadrul Chowdhury <sadrul@chromium.org>
Cr-Commit-Position: refs/heads/master@{#566746}

chrome/browser/about_flags.cc

@@ -3235,6 +3235,10 @@ const FeatureEntry kFeatureEntries[] = {
     {"enable-per-user-timezone", flag_descriptions::kEnablePerUserTimezoneName,
      flag_descriptions::kEnablePerUserTimezoneDescription, kOsCrOS,
      SINGLE_DISABLE_VALUE_TYPE(chromeos::switches::kDisablePerUserTimezone)},
+    {"enable-virtual-keyboard-md-ui",
+     flag_descriptions::kEnableVirtualKeyboardMdUiName,
+     flag_descriptions::kEnableVirtualKeyboardMdUiDescription, kOsCrOS,
+     FEATURE_VALUE_TYPE(features::kEnableVirtualKeyboardMdUi)},
 #endif  // OS_CHROMEOS
 
 #if !defined(OS_ANDROID)

chrome/browser/flag_descriptions.cc

@@ -2927,6 +2927,11 @@ const char kEnableUnifiedMultiDeviceSetupName[] =
 const char kEnableUnifiedMultiDeviceSetupDescription[] =
     "Enable the device to setup all MultiDevice services in a single workflow.";
 
+const char kEnableVirtualKeyboardMdUiName[] =
+    "Enable Material Design virtual keyboard";
+const char kEnableVirtualKeyboardMdUiDescription[] =
+    "If enabled, loads the Material Design UI for the virtual keyboard.";
+
 const char kEnableZipArchiverPackerName[] = "ZIP archiver - Packer";
 const char kEnableZipArchiverPackerDescription[] =
     "Enable the ability to archive files on Drive in the Files app";

chrome/browser/flag_descriptions.h

@@ -1802,6 +1802,9 @@ extern const char kEnableUnifiedMultiDeviceSettingsDescription[];
 extern const char kEnableUnifiedMultiDeviceSetupName[];
 extern const char kEnableUnifiedMultiDeviceSetupDescription[];
 
+extern const char kEnableVirtualKeyboardMdUiName[];
+extern const char kEnableVirtualKeyboardMdUiDescription[];
+
 extern const char kEnableZipArchiverPackerName[];
 extern const char kEnableZipArchiverPackerDescription[];
 

tools/metrics/histograms/enums.xml

@@ -27980,6 +27980,7 @@ from previous Chrome versions.
   <int value="558873715" label="SiteDetails:disabled"/>
   <int value="562979188" label="DesktopIOSPromotion:enabled"/>
   <int value="564522013" label="Av1Decoder:disabled"/>
+  <int value="565406673" label="EnableVirtualKeyboardMdUi:enabled"/>
   <int value="567368307" label="enable-experimental-canvas-features"/>
   <int value="575394365" label="AndroidPaymentApps:disabled"/>
   <int value="576878329" label="enable-background-blur"/>
@@ -28410,6 +28411,7 @@ from previous Chrome versions.
   <int value="1466380480" label="enable-device-discovery-notifications"/>
   <int value="1466502102" label="DelayNavigation:disabled"/>
   <int value="1469407485" label="disable-accelerated-2d-canvas"/>
+  <int value="1473838479" label="EnableVirtualKeyboardMdUi:disabled"/>
   <int value="1474861626" label="disable-multi-mirroring"/>
   <int value="1479248574" label="disable-voice-input"/>
   <int value="1481562816" label="disable-password-link"/>

ui/base/ui_base_features.cc

@@ -29,6 +29,10 @@ const base::Feature kEnableFullscreenHandwritingVirtualKeyboard = {
 const base::Feature kEnableStylusVirtualKeyboard = {
     "enable-stylus-virtual-keyboard", base::FEATURE_DISABLED_BY_DEFAULT};
 
+// If enabled, uses the Material Design UI for virtual keyboard.
+const base::Feature kEnableVirtualKeyboardMdUi = {
+    "EnableVirtualKeyboardMdUi", base::FEATURE_DISABLED_BY_DEFAULT};
+
 // Enables all upcoming UI features.
 const base::Feature kExperimentalUi{"ExperimentalUi",
                                     base::FEATURE_DISABLED_BY_DEFAULT};

ui/base/ui_base_features.h

@@ -18,6 +18,7 @@ UI_BASE_EXPORT extern const base::Feature kEnableFloatingVirtualKeyboard;
 UI_BASE_EXPORT extern const base::Feature
     kEnableFullscreenHandwritingVirtualKeyboard;
 UI_BASE_EXPORT extern const base::Feature kEnableStylusVirtualKeyboard;
+UI_BASE_EXPORT extern const base::Feature kEnableVirtualKeyboardMdUi;
 UI_BASE_EXPORT extern const base::Feature kExperimentalUi;
 UI_BASE_EXPORT extern const base::Feature kSecondaryUiMd;
 UI_BASE_EXPORT extern const base::Feature kSystemKeyboardLock;