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

components/arc/intent_helper/arc_intent_helper_bridge.cc

Index: components/arc/intent_helper/arc_intent_helper_bridge.cc
diff --git a/components/arc/intent_helper/arc_intent_helper_bridge.cc b/components/arc/intent_helper/arc_intent_helper_bridge.cc
index b691412c6e00863612c455b2230e235936bf3f83..bffc4a4111b51840250a2c8c6a8e5b1bfb1074a6 100644
--- a/components/arc/intent_helper/arc_intent_helper_bridge.cc
+++ b/components/arc/intent_helper/arc_intent_helper_bridge.cc
@@ -23,6 +23,9 @@
 
 namespace arc {
 
+// TODO(oka): Avoid to assume the class is singleton.
+ArcIntentHelperBridge* g_arc_intent_helper_bridge = nullptr;
+
 // static
 const char ArcIntentHelperBridge::kArcIntentHelperPackageName[] =
     "org.chromium.arc.intent_helper";
@@ -36,12 +39,25 @@ ArcIntentHelperBridge::ArcIntentHelperBridge(
       icon_loader_(icon_loader),
       activity_resolver_(activity_resolver) {
   DCHECK(thread_checker_.CalledOnValidThread());
+  DCHECK(!g_arc_intent_helper_bridge);
+
   arc_bridge_service()->intent_helper()->AddObserver(this);
+
+  g_arc_intent_helper_bridge = this;
 }
 
 ArcIntentHelperBridge::~ArcIntentHelperBridge() {
   DCHECK(thread_checker_.CalledOnValidThread());
+  DCHECK_EQ(this, g_arc_intent_helper_bridge);
+
   arc_bridge_service()->intent_helper()->RemoveObserver(this);
+
+  g_arc_intent_helper_bridge = nullptr;
+}
+
+// static
+ArcIntentHelperBridge* ArcIntentHelperBridge::Get() {
+  return g_arc_intent_helper_bridge;
 }
 
 void ArcIntentHelperBridge::OnInstanceReady() {
@@ -90,6 +106,14 @@ void ArcIntentHelperBridge::SetWallpaperDeprecated(
   LOG(ERROR) << "IntentHelper.SetWallpaper is deprecated";
 }
 
+void ArcIntentHelperBridge::AddObserver(Observer* observer) {
+  observer_list_.AddObserver(observer);
+}
+
+void ArcIntentHelperBridge::RemoveObserver(Observer* observer) {
+  observer_list_.RemoveObserver(observer);
+}
+
 std::unique_ptr<ash::LinkHandlerModel> ArcIntentHelperBridge::CreateModel(
     const GURL& url) {
   DCHECK(thread_checker_.CalledOnValidThread());
@@ -168,6 +192,9 @@ void ArcIntentHelperBridge::OnIntentFiltersUpdated(
     mojo::Array<mojom::IntentFilterPtr> filters) {
   DCHECK(thread_checker_.CalledOnValidThread());
   activity_resolver_->UpdateIntentFilters(std::move(filters));
+
+  for (auto& observer : observer_list_)
+    observer.OnAppsUpdated();
 }
 
 }  // namespace arc