Notify Files App when ARC++ app is installed/removed

components/arc/intent_helper/arc_intent_helper_bridge.cc

 // Copyright 2016 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/intent_helper/arc_intent_helper_bridge.h"
 
 #include <utility>
 
 #include "ash/common/shell_delegate.h"
 #include "ash/common/wallpaper/wallpaper_controller.h"
@@ skipping 69 matching lines @@
   DCHECK(thread_checker_.CalledOnValidThread());
   ash::WmShell::Get()->wallpaper_controller()->OpenSetWallpaperPage();
 }
 
 void ArcIntentHelperBridge::SetWallpaperDeprecated(
     const std::vector<uint8_t>& jpeg_data) {
   DCHECK(thread_checker_.CalledOnValidThread());
   LOG(ERROR) << "IntentHelper.SetWallpaper is deprecated";
 }
 
+void ArcIntentHelperBridge::AddObserver(ArcIntentHelperObserver* observer) {
+  observer_list_.AddObserver(observer);
+}
+
+void ArcIntentHelperBridge::RemoveObserver(ArcIntentHelperObserver* observer) {
+  observer_list_.RemoveObserver(observer);
+}
+
 std::unique_ptr<ash::LinkHandlerModel> ArcIntentHelperBridge::CreateModel(
     const GURL& url) {
   DCHECK(thread_checker_.CalledOnValidThread());
   std::unique_ptr<LinkHandlerModelImpl> impl(
       new LinkHandlerModelImpl(icon_loader_));
   if (!impl->Init(url))
     return nullptr;
   return std::move(impl);
 }
 
@@ skipping 58 matching lines @@
     const std::string& method_name_for_logging,
     uint32_t min_instance_version) {
   return GetIntentHelperInstanceWithErrorCode(method_name_for_logging,
                                               min_instance_version, nullptr);
 }
 
 void ArcIntentHelperBridge::OnIntentFiltersUpdated(
     std::vector<mojom::IntentFilterPtr> filters) {
   DCHECK(thread_checker_.CalledOnValidThread());
   activity_resolver_->UpdateIntentFilters(std::move(filters));
+
+  for (auto& observer : observer_list_)
+    observer.OnAppsUpdated();
 }
 
 }  // namespace arc