Implement DriveAppRegistry::UninstallApp() and GetAppList().

chrome/browser/drive/drive_app_registry_unittest.cc

 // Copyright 2014 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/drive/drive_app_registry.h"
 
 #include "base/files/file_path.h"
 #include "base/run_loop.h"
 #include "chrome/browser/drive/fake_drive_service.h"
 #include "content/public/test/test_browser_thread_bundle.h"
@@ skipping 119 matching lines @@
   // The requested size is smaller than the smallest icon. The smallest icon
   // should be returned.
   EXPECT_EQ(kSmallerIconUrl,
             util::FindPreferredIcon(icons, kMediumSize - 3).spec());
   // The requested size is larger than the largest icon. The largest icon
   // should be returned.
   EXPECT_EQ(kBiggerIconUrl,
             util::FindPreferredIcon(icons, kMediumSize + 3).spec());
 }
 
+TEST_F(DriveAppRegistryTest, UninstallDriveApp) {
+  apps_registry_->Update();
+  base::RunLoop().RunUntilIdle();
+
+  std::vector<DriveAppInfo> apps;
+  apps_registry_->GetAppList(&apps);
+  size_t original_count = apps.size();
+
+  // Uninstall an existing app.
+  google_apis::GDataErrorCode error = google_apis::GDATA_OTHER_ERROR;
+  apps_registry_->UninstallApp(
+      "123456788192",
+      google_apis::test_util::CreateCopyResultCallback(&error));
+  base::RunLoop().RunUntilIdle();
+  EXPECT_EQ(error, google_apis::HTTP_SUCCESS);
+
+  // Check that the number of apps is decreased by one.
+  apps_registry_->GetAppList(&apps);
+  EXPECT_EQ(original_count - 1, apps.size());
+
+  // Try to uninstall a non-existing app.
+  error = google_apis::GDATA_OTHER_ERROR;
+  apps_registry_->UninstallApp(
+      "non-existing-app-id",
+      google_apis::test_util::CreateCopyResultCallback(&error));
+  base::RunLoop().RunUntilIdle();
+  EXPECT_EQ(error, google_apis::HTTP_NOT_FOUND);
+
+  // Check that the number is not changed this time.
+  apps_registry_->GetAppList(&apps);
+  EXPECT_EQ(original_count - 1, apps.size());
+}
+
 }  // namespace drive