X11: Don't Activate() on Show()

CL 08b6593d added a workaround to make focus work in the case of no
window manager.  This is no longer necessary now that the new
focus-tracking algorithm keeps track of has_pointer_focus_.

BUG=546854

Review-Url: https://codereview.chromium.org/2295443002
Cr-Commit-Position: refs/heads/master@{#415421}

ui/views/widget/desktop_aura/desktop_window_tree_host_x11.cc

@@ -572,13 +572,6 @@ void DesktopWindowTreeHostX11::ShowWindowWithState(
       break;
   }
 
-  // Makes the window activated by default if the state is not INACTIVE or
-  // MINIMIZED.
-  if (show_state != ui::SHOW_STATE_INACTIVE &&
-      show_state != ui::SHOW_STATE_MINIMIZED) {
-    Activate();
-  }
-
   native_widget_delegate_->AsWidget()->SetInitialFocus(show_state);
 }