[Refactor] Replace kFullscreenUsesMinimalChromeKey with WindowState::hide_shelf_when_fullscreen()

ash/wm/window_state.cc

Index: ash/wm/window_state.cc
diff --git a/ash/wm/window_state.cc b/ash/wm/window_state.cc
index 2afba08d68f104fde02c523099d592422e59e859..7f843c2155e634edfcfa0cabbc25ea643da47387 100644
--- a/ash/wm/window_state.cc
+++ b/ash/wm/window_state.cc
@@ -28,6 +28,7 @@ bool WindowState::IsMaximizedOrFullscreenState(ui::WindowShowState show_state) {
 
 WindowState::WindowState(aura::Window* window)
     : window_(window),
+      fullscreen_type_(FULLSCREEN_TYPE_DEFAULT),
       tracked_by_workspace_(true),
       window_position_managed_(false),
       bounds_changed_by_user_(false),
@@ -60,6 +61,13 @@ bool WindowState::IsFullscreen() const {
   return GetShowState() == ui::SHOW_STATE_FULLSCREEN;
 }
 
+bool WindowState::IsImmersiveFullscreen() const {
+  if (!IsFullscreen())
+    return false;
+  return fullscreen_type_ == FULLSCREEN_TYPE_IMMERSIVE_MINIMAL_CHROME ||
+      fullscreen_type_ == FULLSCREEN_TYPE_IMMERSIVE_NO_CHROME;
+}
+
 bool WindowState::IsMaximizedOrFullscreen() const {
   return IsMaximizedOrFullscreenState(GetShowState());
 }
@@ -191,6 +199,12 @@ void WindowState::ClearRestoreBounds() {
   window_->ClearProperty(aura::client::kRestoreBoundsKey);
 }
 
+void WindowState::SetFullscreenType(FullscreenType type) {
+  if (!IsFullscreen())
+    return;
+  fullscreen_type_ = type;
+}
+
 void WindowState::SetPreAutoManageWindowBounds(
     const gfx::Rect& bounds) {
   pre_auto_manage_window_bounds_.reset(new gfx::Rect(bounds));
@@ -219,6 +233,11 @@ void WindowState::OnWindowPropertyChanged(aura::Window* window,
   DCHECK_EQ(window, window_);
   if (key == aura::client::kShowStateKey) {
     window_show_type_ = ToWindowShowType(GetShowState());
+    if (window_show_type_ != ash::wm::SHOW_TYPE_FULLSCREEN &&
+        window_show_type_ != ash::wm::SHOW_TYPE_MINIMIZED) {
+      fullscreen_type_ = FULLSCREEN_TYPE_DEFAULT;
+    }
+
     ui::WindowShowState old_state = static_cast<ui::WindowShowState>(old);
     // TODO(oshima): Notify only when the state has changed.
     // Doing so break a few tests now.