Add notification and observer to copy the file between other users.

* NotificationRegister and NotificationObserver is need to collect
  file information.

* This CL is related to https://codereview.chromium.org/530553006

BUG=412691

Review URL: https://codereview.chromium.org/566433004

Cr-Commit-Position: refs/heads/master@{#294346}

chrome/browser/chromeos/extensions/file_manager/event_router.cc

@@ -269,6 +269,22 @@ std::string FileErrorToErrorName(base::File::Error error_code) {
   }
 }
 
+void GrantAccessForAddedProfileToRunningInstance(Profile* added_profile,
+                                                 Profile* running_profile) {
+  extensions::ProcessManager* const process_manager =
+      extensions::ExtensionSystem::Get(running_profile)->process_manager();
+  if (!process_manager)
+    return;
+
+  extensions::ExtensionHost* const extension_host =
+      process_manager->GetBackgroundHostForExtension(kFileManagerAppId);
+  if (!extension_host || !extension_host->render_process_host())
+    return;
+
+  const int id = extension_host->render_process_host()->GetID();
+  file_manager::util::SetupProfileFileAccessPermissions(id, added_profile);
+}
+
 // Checks if we should send a progress event or not according to the
 // |last_time| of sending an event. If |always| is true, the function always
 // returns true. If the function returns true, the function also updates
@@ -464,6 +480,10 @@ void EventRouter::ObserveEvents() {
   pref_change_registrar_->Add(prefs::kDisableDriveHostedFiles, callback);
   pref_change_registrar_->Add(prefs::kDisableDrive, callback);
   pref_change_registrar_->Add(prefs::kUse24HourClock, callback);
+
+  notification_registrar_.Add(this,
+                              chrome::NOTIFICATION_PROFILE_ADDED,
+                              content::NotificationService::AllSources());
 }
 
 // File watch setup routines.
@@ -936,4 +956,14 @@ void EventRouter::OnFormatCompleted(const std::string& device_path,
   // Do nothing.
 }
 
+void EventRouter::Observe(int type,
+                          const content::NotificationSource& source,
+                          const content::NotificationDetails& details) {
+  if (type == chrome::NOTIFICATION_PROFILE_ADDED) {
+    Profile* const added_profile = content::Source<Profile>(source).ptr();
+    if (!added_profile->IsOffTheRecord())
+      GrantAccessForAddedProfileToRunningInstance(added_profile, profile_);
+  }
+}
+
 }  // namespace file_manager

chrome/browser/chromeos/extensions/file_manager/event_router.h

@@ -52,7 +52,8 @@ class EventRouter : public chromeos::NetworkStateHandlerObserver,
                     public drive::FileSystemObserver,
                     public drive::JobListObserver,
                     public drive::DriveServiceObserver,
-                    public VolumeManagerObserver {
+                    public VolumeManagerObserver,
+                    public content::NotificationObserver {
  public:
   explicit EventRouter(Profile* profile);
   virtual ~EventRouter();
@@ -126,6 +127,11 @@ class EventRouter : public chromeos::NetworkStateHandlerObserver,
   virtual void OnFormatCompleted(
       const std::string& device_path, bool success) OVERRIDE;
 
+  // content::NotificationObserver overrides.
+  virtual void Observe(int type,
+                       const content::NotificationSource& source,
+                       const content::NotificationDetails& details) OVERRIDE;
+
  private:
   typedef std::map<base::FilePath, FileWatcher*> WatcherMap;
 
@@ -197,6 +203,8 @@ class EventRouter : public chromeos::NetworkStateHandlerObserver,
   scoped_ptr<PrefChangeRegistrar> pref_change_registrar_;
   Profile* profile_;
 
+  content::NotificationRegistrar notification_registrar_;
+
   scoped_ptr<DeviceEventRouter> device_event_router_;
 
   // Note: This should remain the last member so it'll be destroyed and