[mus+ash] removes WmWindow, wm_window.h and wm_window.cc

ash/root_window_controller.cc

Index: ash/root_window_controller.cc
diff --git a/ash/root_window_controller.cc b/ash/root_window_controller.cc
index 70ca0ef2383f31c0807b7242e69395f9ffe7e95c..ec3e336d5a2a5b2e8472ba953e37e7208fb434d0 100644
--- a/ash/root_window_controller.cc
+++ b/ash/root_window_controller.cc
@@ -55,7 +55,6 @@
 #include "ash/wm/window_util.h"
 #include "ash/wm/workspace/workspace_layout_manager.h"
 #include "ash/wm/workspace_controller.h"
-#include "ash/wm_window.h"
 #include "base/command_line.h"
 #include "base/macros.h"
 #include "base/memory/ptr_util.h"
@@ -344,10 +343,6 @@ const aura::Window* RootWindowController::GetRootWindow() const {
   return GetHost()->window();
 }
 
-const WmWindow* RootWindowController::GetWindow() const {
-  return WmWindow::Get(GetRootWindow());
-}
-
 wm::WorkspaceWindowState RootWindowController::GetWorkspaceWindowState() {
   return workspace_controller_ ? workspace_controller()->GetWindowState()
                                : wm::WORKSPACE_WINDOW_STATE_DEFAULT;
@@ -482,11 +477,6 @@ const aura::Window* RootWindowController::GetContainer(int container_id) const {
   return window_tree_host_->window()->GetChildById(container_id);
 }
 
-const WmWindow* RootWindowController::GetWmContainer(int container_id) const {
-  const aura::Window* window = GetContainer(container_id);
-  return WmWindow::Get(window);
-}
-
 void RootWindowController::SetWallpaperWidgetController(
     WallpaperWidgetController* controller) {
   wallpaper_widget_controller_.reset(controller);