Folds methods in WmShellCommon to WmShell

ash/common/wm/maximize_mode/maximize_mode_window_manager.cc

 // Copyright 2014 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/maximize_mode/maximize_mode_window_manager.h"
 
 #include "ash/common/ash_switches.h"
 #include "ash/common/session/session_state_delegate.h"
 #include "ash/common/shell_window_ids.h"
 #include "ash/common/wm/maximize_mode/maximize_mode_event_handler.h"
@@ skipping 153 matching lines @@
   MaximizeAllWindows();
   AddWindowCreationObservers();
   EnableBackdropBehindTopWindowOnEachDisplay(true);
   display::Screen::GetScreen()->AddObserver(this);
   WmShell::Get()->AddShellObserver(this);
   event_handler_ = WmShell::Get()->CreateMaximizeModeEventHandler();
 }
 
 void MaximizeModeWindowManager::MaximizeAllWindows() {
   MruWindowTracker::WindowList windows =
-      WmShell::Get()->GetMruWindowTracker()->BuildWindowListIgnoreModal();
+      WmShell::Get()->mru_window_tracker()->BuildWindowListIgnoreModal();
   // Add all existing Mru windows.
   for (WmWindow* window : windows)
     MaximizeAndTrackWindow(window);
 }
 
 void MaximizeModeWindowManager::RestoreAllWindows() {
   while (window_state_map_.size())
     ForgetWindow(window_state_map_.begin()->first);
 }
 
@@ skipping 91 matching lines @@
   for (WmWindow* root : WmShell::Get()->GetAllRootWindows()) {
     WmRootWindowController* controller = root->GetRootWindowController();
     WmWindow* default_container =
         root->GetChildByShellWindowId(kShellWindowId_DefaultContainer);
     controller->SetMaximizeBackdropDelegate(base::WrapUnique(
         enable ? new WorkspaceBackdropDelegate(default_container) : nullptr));
   }
 }
 
 }  // namespace ash