Perform install tasks for newly installed or upgraded component apps/extensions.

chrome/browser/extensions/extension_service_unittest.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/extensions/extension_service_unittest.h"
 
 #include <algorithm>
 #include <set>
 #include <vector>
 
@@ skipping 4681 matching lines @@
   service_->Init();
 
   // Note that we do not pump messages -- the extension should be loaded
   // immediately.
 
   EXPECT_EQ(0u, GetErrors().size());
   ASSERT_EQ(1u, loaded_.size());
   EXPECT_EQ(Extension::COMPONENT, loaded_[0]->location());
   EXPECT_EQ(1u, service_->extensions()->size());
 
-  // Component extensions shouldn't get recorded in the prefs.
-  ValidatePrefKeyCount(0);
+  // Component extensions get a prefs entry on first install.
+  ValidatePrefKeyCount(1);
 
   // Reload all extensions, and make sure it comes back.
   std::string extension_id = (*service_->extensions()->begin())->id();
   loaded_.clear();
   service_->ReloadExtensions();
   ASSERT_EQ(1u, service_->extensions()->size());
   EXPECT_EQ(extension_id, (*service_->extensions()->begin())->id());
 }
 
 namespace {
@@ skipping 1123 matching lines @@
   EXPECT_FALSE(extensions::HasExternalInstallError(service_));
   EXPECT_FALSE(service_->IsExtensionEnabled(good_crx));
   EXPECT_TRUE(service_->IsExtensionEnabled(page_action));
 
   ExtensionPrefs* prefs = service_->extension_prefs();
   EXPECT_NE(0, prefs->GetDisableReasons(good_crx) &
       Extension::DISABLE_SIDELOAD_WIPEOUT);
   EXPECT_EQ(0, prefs->GetDisableReasons(page_action) &
       Extension::DISABLE_SIDELOAD_WIPEOUT);
 }