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

chrome/browser/ui/views/apps/chrome_native_app_window_views_win.cc

Index: chrome/browser/ui/views/apps/chrome_native_app_window_views_win.cc
diff --git a/chrome/browser/ui/views/apps/chrome_native_app_window_views_win.cc b/chrome/browser/ui/views/apps/chrome_native_app_window_views_win.cc
index eaa1ec6a0cf1a5665c8882206e45a62f4689536e..0290eef1cdcf251bf8a5a93e500cb52481b2c44d 100644
--- a/chrome/browser/ui/views/apps/chrome_native_app_window_views_win.cc
+++ b/chrome/browser/ui/views/apps/chrome_native_app_window_views_win.cc
@@ -12,7 +12,6 @@
 #include "base/threading/sequenced_worker_pool.h"
 #include "chrome/browser/apps/per_app_settings_service.h"
 #include "chrome/browser/apps/per_app_settings_service_factory.h"
-#include "chrome/browser/metro_utils/metro_chrome_win.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/shell_integration.h"
 #include "chrome/browser/ui/views/apps/app_window_desktop_native_widget_aura_win.h"
@@ -39,16 +38,6 @@ ChromeNativeAppWindowViewsWin::ChromeNativeAppWindowViewsWin()
 ChromeNativeAppWindowViewsWin::~ChromeNativeAppWindowViewsWin() {
 }
 
-void ChromeNativeAppWindowViewsWin::ActivateParentDesktopIfNecessary() {
-  // Only switching into Ash from Native is supported. Tearing the user out of
-  // Metro mode can only be done by launching a process from Metro mode itself.
-  // This is done for launching apps, but not regular activations.
-  if (IsRunningInAsh() &&
-      chrome::GetActiveDesktop() == chrome::HOST_DESKTOP_TYPE_NATIVE) {
-    chrome::ActivateMetroChrome();
-  }
-}
-
 HWND ChromeNativeAppWindowViewsWin::GetNativeAppWindowHWND() const {
   return views::HWNDForWidget(widget()->GetTopLevelWidget());
 }
@@ -150,12 +139,10 @@ ChromeNativeAppWindowViewsWin::CreateStandardDesktopAppFrame() {
 }
 
 void ChromeNativeAppWindowViewsWin::Show() {
-  ActivateParentDesktopIfNecessary();
   ChromeNativeAppWindowViewsAura::Show();
 }
 
 void ChromeNativeAppWindowViewsWin::Activate() {
-  ActivateParentDesktopIfNecessary();
   ChromeNativeAppWindowViewsAura::Activate();
 }