Add a full screen virtual keyboard to virtual keyboard root window

ui/keyboard/keyboard_controller.cc

Index: ui/keyboard/keyboard_controller.cc
diff --git a/ui/keyboard/keyboard_controller.cc b/ui/keyboard/keyboard_controller.cc
index 00a3b1bd58d63b84eda8f2b6e10fec50ba9574c2..537cf12b9f7b37b673de5565bdfbcadac60ea9bf 100644
--- a/ui/keyboard/keyboard_controller.cc
+++ b/ui/keyboard/keyboard_controller.cc
@@ -27,7 +27,8 @@ namespace {
 const int kHideKeyboardDelayMs = 100;
 
 gfx::Rect KeyboardBoundsFromWindowBounds(const gfx::Rect& window_bounds) {
-  const float kKeyboardHeightRatio = 0.3f;
+  const float kKeyboardHeightRatio =
+      keyboard::IsKeyboardUsabilityExperimentEnabled() ? 1.0f : 0.3f;
   return gfx::Rect(
       window_bounds.x(),
       window_bounds.y() + window_bounds.height() * (1 - kKeyboardHeightRatio),
@@ -191,8 +192,7 @@ void KeyboardController::OnTextInputStateChanged(
   ui::TextInputType type =
       client ? client->GetTextInputType() : ui::TEXT_INPUT_TYPE_NONE;
   if (type == ui::TEXT_INPUT_TYPE_NONE &&
-      !CommandLine::ForCurrentProcess()->HasSwitch(
-          switches::kKeyboardUsabilityTest)) {
+      !IsKeyboardUsabilityExperimentEnabled()) {
     should_show = false;
   } else {
     if (container_->children().empty()) {
@@ -202,7 +202,8 @@ void KeyboardController::OnTextInputStateChanged(
       container_->AddChild(keyboard);
       container_->layout_manager()->OnWindowResized();
     }
-    proxy_->SetUpdateInputType(type);
+    if (type != ui::TEXT_INPUT_TYPE_NONE)
+      proxy_->SetUpdateInputType(type);
     container_->parent()->StackChildAtTop(container_.get());
     should_show = true;
   }