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..b796ffc936e8fc66b839de8d0c9dd21165577ffb 100644
--- a/chrome/browser/extensions/extension_service.cc
+++ b/chrome/browser/extensions/extension_service.cc
@@ -373,7 +373,8 @@ ExtensionService::ExtensionService(Profile* profile,
       installs_delayed_for_gc_(false),
       is_first_run_(false),
       app_sync_bundle_(this),
-      extension_sync_bundle_(this) {
+      extension_sync_bundle_(this),
+      disable_garbage_collection_(false) {
   CHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 
   // Figure out if extension installation should be enabled.
@@ -1983,6 +1984,11 @@ void ExtensionService::ReloadExtensions() {
 }
 
 void ExtensionService::GarbageCollectExtensions() {
+#if defined(OS_CHROMEOS)
+  if (disable_garbage_collection_)
+    return;
+#endif
+
   if (extension_prefs_->pref_service()->ReadOnly())
     return;