mash: Use ChromeLauncherControllerImpl, remove Mus subclass stub.

chrome/browser/ui/ash/launcher/browser_status_monitor.cc

 // Copyright 2013 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 "chrome/browser/ui/ash/launcher/browser_status_monitor.h"
 
 #include "ash/shell.h"
 #include "ash/wm/window_util.h"
 #include "base/macros.h"
 #include "base/memory/ptr_util.h"
+#include "chrome/browser/ui/ash/ash_util.h"
 #include "chrome/browser/ui/ash/launcher/browser_shortcut_launcher_item_controller.h"
 #include "chrome/browser/ui/ash/launcher/chrome_launcher_controller.h"
 #include "chrome/browser/ui/ash/launcher/chrome_launcher_controller_util.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_finder.h"
 #include "chrome/browser/ui/browser_list.h"
 #include "chrome/browser/ui/browser_window.h"
 #include "chrome/browser/ui/tabs/tab_strip_model.h"
 #include "chrome/browser/web_applications/web_app.h"
 #include "content/public/browser/navigation_handle.h"
@@ skipping 54 matching lines @@
   BrowserStatusMonitor* monitor_;
 
   DISALLOW_COPY_AND_ASSIGN(LocalWebContentsObserver);
 };
 
 BrowserStatusMonitor::BrowserStatusMonitor(
     ChromeLauncherController* launcher_controller)
     : launcher_controller_(launcher_controller),
       browser_tab_strip_tracker_(this, this, this) {
   DCHECK(launcher_controller_);
-  ash::Shell::Get()->activation_client()->AddObserver(this);
+  // TODO(crbug.com/557406): Fix this interaction pattern in Mash.
+  if (!ash_util::IsRunningInMash())
+    ash::Shell::Get()->activation_client()->AddObserver(this);
 }
 
 BrowserStatusMonitor::~BrowserStatusMonitor() {
-  ash::Shell::Get()->activation_client()->RemoveObserver(this);
+  if (!ash_util::IsRunningInMash())
+    ash::Shell::Get()->activation_client()->RemoveObserver(this);
   browser_tab_strip_tracker_.StopObservingAndSendOnBrowserRemoved();
 }
 
 void BrowserStatusMonitor::Initialize() {
   DCHECK(!initialized_);
   initialized_ = true;
   browser_tab_strip_tracker_.Init();
 }
 
 void BrowserStatusMonitor::UpdateAppItemState(
@@ skipping 210 matching lines @@
     content::WebContents* contents) {
   return launcher_controller_->GetShelfIDForWebContents(contents);
 }
 
 void BrowserStatusMonitor::SetShelfIDForBrowserWindowContents(
     Browser* browser,
     content::WebContents* web_contents) {
   launcher_controller_->GetBrowserShortcutLauncherItemController()->
       SetShelfIDForBrowserWindowContents(browser, web_contents);
 }