Remove persisted docked windows

ui/views/widget/native_widget_aura.cc

Index: ui/views/widget/native_widget_aura.cc
diff --git a/ui/views/widget/native_widget_aura.cc b/ui/views/widget/native_widget_aura.cc
index 8082fb5a3f3c295563e9e92fbd9c92da36ca445d..5edfc18b00327a3e35446f26cfff883403c0c044 100644
--- a/ui/views/widget/native_widget_aura.cc
+++ b/ui/views/widget/native_widget_aura.cc
@@ -534,6 +534,7 @@ void NativeWidgetAura::ShowWithWindowState(ui::WindowShowState state) {
   if (!window_)
     return;
 
+  // TODO(afakhry): Remove Docked Windows in M58.
   if (state == ui::SHOW_STATE_MAXIMIZED || state == ui::SHOW_STATE_FULLSCREEN ||
       state == ui::SHOW_STATE_DOCKED) {
     window_->SetProperty(aura::client::kShowStateKey, state);
@@ -992,6 +993,7 @@ NativeWidgetAura::~NativeWidgetAura() {
 ////////////////////////////////////////////////////////////////////////////////
 // NativeWidgetAura, private:
 
+// TODO(afakhry): Remove Docked Windows in M58.
 bool NativeWidgetAura::IsDocked() const {
   return window_ &&
          window_->GetProperty(aura::client::kShowStateKey) ==