[Sync] Add support for enabling/disabling an extension before it's installed

chrome/browser/extensions/extension_service_unittest.cc

 // Copyright (c) 2011 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 3611 matching lines @@
 
   EXPECT_FALSE(service_->pending_extension_manager()->IsIdPending(good_crx));
 }
 
 TEST_F(ExtensionServiceTest, ProcessSyncDataNotInstalled) {
   InitializeExtensionServiceWithUpdater();
 
   ExtensionSyncData extension_sync_data;
   extension_sync_data.id = good_crx;
   extension_sync_data.update_url = GURL("http://www.google.com");
-  extension_sync_data.enabled = true;
+  extension_sync_data.enabled = false;
   extension_sync_data.incognito_enabled = true;
   {
     scoped_ptr<Version> version(Version::GetVersionFromString("1.2.3.4"));
     extension_sync_data.version = *version;
   }
 
+  EXPECT_TRUE(service_->IsExtensionEnabled(good_crx));
   EXPECT_FALSE(service_->IsIncognitoEnabled(good_crx));
   service_->ProcessSyncData(extension_sync_data, &AllExtensions);
   EXPECT_TRUE(service_->updater()->WillCheckSoon());
+  EXPECT_FALSE(service_->IsExtensionEnabled(good_crx));
   EXPECT_TRUE(service_->IsIncognitoEnabled(good_crx));
 
   PendingExtensionInfo info;
   EXPECT_TRUE(
       service_->pending_extension_manager()->GetById(good_crx, &info));
   EXPECT_EQ(extension_sync_data.update_url, info.update_url());
   EXPECT_TRUE(info.is_from_sync());
   EXPECT_TRUE(info.install_silently());
   EXPECT_EQ(extension_sync_data.enabled, info.enable_on_install());
   EXPECT_EQ(Extension::INTERNAL, info.install_source());
@@ skipping 145 matching lines @@
   ASSERT_FALSE(AddPendingSyncInstall());
 
   // Wait for the external source to install.
   WaitForCrxInstall(crx_path_, true);
   ASSERT_TRUE(IsCrxInstalled());
 
   // Now that the extension is installed, sync request should fail
   // because the extension is already installed.
   ASSERT_FALSE(AddPendingSyncInstall());
 }