Don't support active user switching in hotwording outside ChromeOS.

chrome/browser/search/hotword_service.cc

Index: chrome/browser/search/hotword_service.cc
diff --git a/chrome/browser/search/hotword_service.cc b/chrome/browser/search/hotword_service.cc
index cecf9c5e33b7a219e022bb86e9bf74126c3f2ad3..293884de0d2f9507e33868ed2904ef9e63adf68c 100644
--- a/chrome/browser/search/hotword_service.cc
+++ b/chrome/browser/search/hotword_service.cc
@@ -819,5 +819,14 @@ void HotwordService::ActiveUserChanged() {
 }
 
 bool HotwordService::UserIsActive() {
-  return profile_ == ProfileManager::GetActiveUserProfile();
+#if defined(OS_CHROMEOS)
+  // Only support multiple profiles and profile switching in ChromeOS.
+  if (user_manager::UserManager::IsInitialized()) {
+    user_manager::User* user =
+        user_manager::UserManager::Get()->GetActiveUser();
+    if (user && user->is_profile_created())
+      return profile_ == ProfileManager::GetActiveUserProfile();
+  }
+#endif
+  return true;
 }