Add a hack to allow us to disable extension garbage collection.

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 6a57a5d499b93b2fcede32c6ef55d325f0b2eb04..2ffd3913940c36e156555a4001660e8cf1b73e71 100644
--- a/chrome/browser/extensions/extension_service.cc
+++ b/chrome/browser/extensions/extension_service.cc
@@ -374,6 +374,9 @@ ExtensionService::ExtensionService(Profile* profile,
       is_first_run_(false),
       app_sync_bundle_(this),
       extension_sync_bundle_(this) {
+#if defined(OS_CHROMEOS)
+  disable_garbage_collection_ = false;
+#endif
   CHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 
   // Figure out if extension installation should be enabled.
@@ -1983,6 +1986,11 @@ void ExtensionService::ReloadExtensions() {
 }
 
 void ExtensionService::GarbageCollectExtensions() {
+#if defined(OS_CHROMEOS)
+  if (disable_garbage_collection_)
+    return;
+#endif
+
   if (extension_prefs_->pref_service()->ReadOnly())
     return;