Create a ProfileDependencyManager to order ProfileKeyedService destruction.

chrome/browser/themes/theme_service.cc

Index: chrome/browser/themes/theme_service.cc
diff --git a/chrome/browser/themes/theme_service.cc b/chrome/browser/themes/theme_service.cc
index 1731b47bbf9881445db31b9c9cf2b9ccc5dc49d7..3c4c3ff63b87859406d0262df87f679b00a904da 100644
--- a/chrome/browser/themes/theme_service.cc
+++ b/chrome/browser/themes/theme_service.cc
@@ -209,6 +209,10 @@ void ThemeService::Init(Profile* profile) {
   DCHECK(CalledOnValidThread());
   profile_ = profile;
 
+  registrar_.Add(this,
+                 NotificationType::THEME_INSTALLED,
+                 Source<Profile>(profile_));
+
   LoadThemePrefs();
 }
 
@@ -604,6 +608,14 @@ void ThemeService::FreePlatformCaches() {
 }
 #endif
 
+void ThemeService::Observe(NotificationType type,
+                           const NotificationSource& source,
+                           const NotificationDetails& details) {
+  DCHECK(type == NotificationType::THEME_INSTALLED);
+  const Extension* extension = Details<const Extension>(details).ptr();
+  SetTheme(extension);
+}
+
 void ThemeService::SavePackName(const FilePath& pack_path) {
   profile_->GetPrefs()->SetFilePath(
       prefs::kCurrentThemePackFilename, pack_path);