arc: Handle default app not availble case.

components/arc/test/fake_app_instance.cc

 // Copyright 2015 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 "components/arc/test/fake_app_instance.h"
 
 #include <stdint.h>
 
 #include <string>
 #include <utility>
@@ skipping 173 matching lines @@
 }
 
 void FakeAppInstance::SendPackageAdded(const mojom::ArcPackageInfo& package) {
   app_host_->OnPackageAdded(mojom::ArcPackageInfoPtr(package.Clone()));
 }
 
 void FakeAppInstance::SendPackageUninstalled(const std::string& package_name) {
   app_host_->OnPackageRemoved(package_name);
 }
 
+void FakeAppInstance::SendInstallationStarted(const std::string& package_name) {
+  app_host_->OnInstallationStarted(package_name);
+}
+
+void FakeAppInstance::SendInstallationFinished(const std::string& package_name,
+                                               bool success) {
+  app_host_->OnInstallationFinished(package_name, success);
+}
+
 void FakeAppInstance::CanHandleResolution(
     const std::string& package_name,
     const std::string& activity,
     const gfx::Rect& dimension,
     const CanHandleResolutionCallback& callback) {
   callback.Run(true);
 }
 
 void FakeAppInstance::UninstallPackage(const std::string& package_name) {
   app_host_->OnPackageRemoved(package_name);
@@ skipping 44 matching lines @@
 
   std::string png_data_as_string;
   if (GetFakeIcon(scale_factor, &png_data_as_string)) {
     callback.Run(mojo::Array<uint8_t>::From(png_data_as_string));
   }
 }
 
 void FakeAppInstance::RemoveCachedIcon(const std::string& icon_resource_id) {}
 
 }  // namespace arc