Add resizable floating keyboard flag

We want to create a prototype of a resizable floating virtual keyboard. This flag will be used to enable / disable the prototype.

Bug: 1019990
Change-Id: I6194b024842ee177bca2180c74e69836d26897bf
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1882256Reviewed-by: Darren Shen <shend@chromium.org>
Reviewed-by: Xiaoqian Dai <xdai@chromium.org>
Commit-Queue: Curtis McMullan <curtismcmullan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#712916}

chrome/browser/extensions/api/virtual_keyboard_private/chrome_virtual_keyboard_delegate.cc

@@ -398,6 +398,10 @@ void ChromeVirtualKeyboardDelegate::OnHasInputDevices(
   features->AppendString(GenerateFeatureFlag(
       "borderedkey", base::FeatureList::IsEnabled(
                          chromeos::features::kVirtualKeyboardBorderedKey)));
+  features->AppendString(GenerateFeatureFlag(
+      "resizablefloatingkeyboard",
+      base::FeatureList::IsEnabled(
+          chromeos::features::kVirtualKeyboardFloatingResizable)));
 
   results->Set("features", std::move(features));
 

chromeos/constants/chromeos_features.cc

@@ -272,6 +272,10 @@ const base::Feature kVideoPlayerNativeControls{
 const base::Feature kVirtualKeyboardBorderedKey{
     "VirtualKeyboardBorderedKey", base::FEATURE_DISABLED_BY_DEFAULT};
 
+// Enable or disable resizable floating virtual keyboard on Chrome OS.
+const base::Feature kVirtualKeyboardFloatingResizable{
+    "VirtualKeyboardFloatingResizable", base::FEATURE_DISABLED_BY_DEFAULT};
+
 ////////////////////////////////////////////////////////////////////////////////
 
 bool IsAmbientModeEnabled() {

chromeos/constants/chromeos_features.h

@@ -125,6 +125,8 @@ COMPONENT_EXPORT(CHROMEOS_CONSTANTS)
 extern const base::Feature kVideoPlayerNativeControls;
 COMPONENT_EXPORT(CHROMEOS_CONSTANTS)
 extern const base::Feature kVirtualKeyboardBorderedKey;
+COMPONENT_EXPORT(CHROMEOS_CONSTANTS)
+extern const base::Feature kVirtualKeyboardFloatingResizable;
 
 // Keep alphabetized.