mash: Remove WmRootWindowControllerObserver.

ash/common/wm/workspace/workspace_layout_manager.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ash/common/wm/workspace/workspace_layout_manager.h"
 
 #include <algorithm>
 
 #include "ash/common/session/session_state_delegate.h"
 #include "ash/common/shelf/wm_shelf.h"
 #include "ash/common/shell_window_ids.h"
 #include "ash/common/wm/always_on_top_controller.h"
 #include "ash/common/wm/fullscreen_window_finder.h"
 #include "ash/common/wm/window_positioner.h"
 #include "ash/common/wm/window_state.h"
 #include "ash/common/wm/wm_event.h"
 #include "ash/common/wm/wm_screen_util.h"
 #include "ash/common/wm/workspace/workspace_layout_manager_backdrop_delegate.h"
 #include "ash/common/wm_root_window_controller.h"
 #include "ash/common/wm_shell.h"
 #include "ash/common/wm_window.h"
 #include "ash/common/wm_window_property.h"
 #include "base/command_line.h"
 #include "ui/base/ui_base_switches.h"
 #include "ui/compositor/layer.h"
+#include "ui/display/display.h"
+#include "ui/display/screen.h"
 #include "ui/keyboard/keyboard_controller.h"
 #include "ui/keyboard/keyboard_controller_observer.h"
 
 namespace ash {
 
 WorkspaceLayoutManager::WorkspaceLayoutManager(WmWindow* window)
     : window_(window),
       root_window_(window->GetRootWindow()),
       root_window_controller_(root_window_->GetRootWindowController()),
       shell_(window_->GetShell()),
       work_area_in_parent_(wm::GetDisplayWorkAreaBounds(window_)),
       is_fullscreen_(wm::GetWindowForFullscreenMode(window) != nullptr) {
   shell_->AddShellObserver(this);
   shell_->AddActivationObserver(this);
   root_window_->AddObserver(this);
-  root_window_controller_->AddObserver(this);
+  display::Screen::GetScreen()->AddObserver(this);
   DCHECK(window->GetBoolProperty(
       WmWindowProperty::SNAP_CHILDREN_TO_PIXEL_BOUNDARY));
 }
 
 WorkspaceLayoutManager::~WorkspaceLayoutManager() {
   if (root_window_)
     root_window_->RemoveObserver(this);
   for (WmWindow* window : windows_) {
     wm::WindowState* window_state = window->GetWindowState();
     window_state->RemoveObserver(this);
     window->RemoveObserver(this);
   }
-  root_window_->GetRootWindowController()->RemoveObserver(this);
+  display::Screen::GetScreen()->RemoveObserver(this);
   shell_->RemoveActivationObserver(this);
   shell_->RemoveShellObserver(this);
 }
 
 void WorkspaceLayoutManager::SetMaximizeBackdropDelegate(
     std::unique_ptr<WorkspaceLayoutManagerBackdropDelegate> delegate) {
   backdrop_delegate_.reset(delegate.release());
 }
 
 //////////////////////////////////////////////////////////////////////////////
@@ skipping 102 matching lines @@
   } else if (window_state->HasRestoreBounds()) {
     // Keyboard hidden, restore original bounds if they exist. If the user has
     // resized or dragged the window in the meantime, WorkspaceWindowResizer
     // will have cleared the restore bounds and this code will not accidentally
     // override user intent.
     window_state->SetAndClearRestoreBounds();
   }
 }
 
 //////////////////////////////////////////////////////////////////////////////
-// WorkspaceLayoutManager, WmRootWindowControllerObserver implementation:
-
-void WorkspaceLayoutManager::OnWorkAreaChanged() {
-  const gfx::Rect work_area(wm::GetDisplayWorkAreaBounds(window_));
-  if (work_area != work_area_in_parent_) {
-    const wm::WMEvent event(wm::WM_EVENT_WORKAREA_BOUNDS_CHANGED);
-    AdjustAllWindowsBoundsForWorkAreaChange(&event);
-  }
-  if (backdrop_delegate_)
-    backdrop_delegate_->OnDisplayWorkAreaInsetsChanged();
-}
-
-//////////////////////////////////////////////////////////////////////////////
 // WorkspaceLayoutManager, aura::WindowObserver implementation:
 
 void WorkspaceLayoutManager::OnWindowTreeChanged(
     WmWindow* window,
     const WmWindowObserver::TreeChangeParams& params) {
   if (!params.target->GetWindowState()->IsActive())
     return;
   // If the window is already tracked by the workspace this update would be
   // redundant as the fullscreen and shelf state would have been handled in
   // OnWindowAddedToLayout.
@@ skipping 75 matching lines @@
       old_type == wm::WINDOW_STATE_TYPE_FULLSCREEN) {
     UpdateFullscreenState();
   }
 
   UpdateShelfVisibility();
   if (backdrop_delegate_)
     backdrop_delegate_->OnPostWindowStateTypeChange(window_state, old_type);
 }
 
 //////////////////////////////////////////////////////////////////////////////
+// WorkspaceLayoutManager, display::DisplayObserver implementation:
+
+void WorkspaceLayoutManager::OnDisplayMetricsChanged(
+    const display::Display& display,
+    uint32_t changed_metrics) {
+  if (window_->GetDisplayNearestWindow().id() != display.id())
+    return;
+
+  const gfx::Rect work_area(wm::GetDisplayWorkAreaBounds(window_));
+  if (work_area != work_area_in_parent_) {
+    const wm::WMEvent event(wm::WM_EVENT_WORKAREA_BOUNDS_CHANGED);
+    AdjustAllWindowsBoundsForWorkAreaChange(&event);
+  }
+  if (backdrop_delegate_)
+    backdrop_delegate_->OnDisplayWorkAreaInsetsChanged();
+}
+
+//////////////////////////////////////////////////////////////////////////////
 // WorkspaceLayoutManager, ShellObserver implementation:
 
 void WorkspaceLayoutManager::OnFullscreenStateChanged(bool is_fullscreen,
                                                       WmWindow* root_window) {
   if (root_window != root_window_ || is_fullscreen_ == is_fullscreen)
     return;
 
   is_fullscreen_ = is_fullscreen;
   if (WmShell::Get()->IsPinned()) {
     // If this is in pinned mode, then this event does not trigger the
@@ skipping 73 matching lines @@
   for (auto* window : windows) {
     wm::WindowState* window_state = window->GetWindowState();
     if (window_on_top)
       window_state->DisableAlwaysOnTop(window_on_top);
     else
       window_state->RestoreAlwaysOnTop();
   }
 }
 
 }  // namespace ash