Remove base/win/metro.{cc|h} and some associated code

chrome/browser/browser_process_platform_part_aurawin.cc

 // Copyright (c) 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/browser_process_platform_part_aurawin.h"
 
 #include "base/command_line.h"
 #include "base/logging.h"
 #include "base/prefs/pref_service.h"
 #include "base/process/kill.h"
@@ skipping 38 matching lines @@
                    !metro_viewer_process_host_.get()));
   if (!connect)
     return;
   // Create a host to connect to the Metro viewer process over IPC.
   metro_viewer_process_host_.reset(new ChromeMetroViewerProcessHost());
   if (launch) {
     CHECK(metro_viewer_process_host_->LaunchViewerAndWaitForConnection(
         command_line.GetSwitchValueNative(
             switches::kViewerLaunchViaAppId)));
   }
-
 }
 
 void BrowserProcessPlatformPart::Observe(
     int type,
     const content::NotificationSource& source,
     const content::NotificationDetails& details) {
 
   DCHECK(type == chrome::NOTIFICATION_APP_TERMINATING);
   PrefService* pref_service = g_browser_process->local_state();
   bool is_relaunch = pref_service->GetBoolean(prefs::kWasRestarted);
   if (is_relaunch) {
-    upgrade_util::RelaunchMode mode =
-        upgrade_util::RelaunchModeStringToEnum(
-            pref_service->GetString(prefs::kRelaunchMode));
-    if (metro_viewer_process_host_.get()) {
-      if (mode == upgrade_util::RELAUNCH_MODE_DESKTOP) {
-        // Metro -> Desktop
-        chrome::ActivateDesktopHelper(chrome::ASH_TERMINATE);
-      } else {
-        // Metro -> Metro
-        ChromeMetroViewerProcessHost::HandleMetroExit();
-      }
-    }
+    // TODO(scottmg): A lot of this can be removed http://crbug.com/558054.
   }
 }