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

chrome/browser/drive/drive_app_registry_unittest.cc

Index: chrome/browser/drive/drive_app_registry_unittest.cc
diff --git a/chrome/browser/drive/drive_app_registry_unittest.cc b/chrome/browser/drive/drive_app_registry_unittest.cc
index 1343f45f782ea612e34aec2afe31e5eedfa1b105..77d828f0573f7ffa643b6005dc22354ed29c7dbc 100644
--- a/chrome/browser/drive/drive_app_registry_unittest.cc
+++ b/chrome/browser/drive/drive_app_registry_unittest.cc
@@ -137,4 +137,37 @@ TEST(DriveAppRegistryUtilTest, FindPreferredIcon_) {
             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