Revert changes to have ExtensionService notify ThemeService directly for themes

chrome/browser/extensions/extension_service.cc

Index: chrome/browser/extensions/extension_service.cc
diff --git a/chrome/browser/extensions/extension_service.cc b/chrome/browser/extensions/extension_service.cc
index 83e1a881fedeb66068649a09d60a756e5bce9af9..2ac4a028511c33cae40d2723b6df4f6392e1914d 100644
--- a/chrome/browser/extensions/extension_service.cc
+++ b/chrome/browser/extensions/extension_service.cc
@@ -2550,20 +2550,6 @@ void ExtensionService::FinishInstallation(const Extension* extension) {
 
   AddExtension(extension);
 
-#if defined(ENABLE_THEMES)
-  // We do this here since AddExtension() is always called on browser
-  // startup, and we only really care about the last theme installed.
-  // If that ever changes and we have to move this code somewhere
-  // else, it should be somewhere that's not in the startup path.
-  if (extension->is_theme() && extensions_.GetByID(extension->id())) {
-    DCHECK_EQ(extensions_.GetByID(extension->id()), extension);
-    // Now that the theme extension is visible from outside the
-    // ExtensionService, notify the ThemeService about the
-    // newly-installed theme.
-    ThemeServiceFactory::GetForProfile(profile_)->SetTheme(extension);
-  }
-#endif
-
   // If this is a new external extension that was disabled, alert the user
   // so he can reenable it. We do this last so that it has already been
   // added to our list of extensions.