Add garbage collection for shared extensions on Chrome OS

chrome/browser/extensions/extension_garbage_collector_chromeos.cc

Index: chrome/browser/extensions/extension_garbage_collector_chromeos.cc
diff --git a/chrome/browser/extensions/extension_garbage_collector_chromeos.cc b/chrome/browser/extensions/extension_garbage_collector_chromeos.cc
new file mode 100644
index 0000000000000000000000000000000000000000..f385a041ce61d0b4e2eff1b1e6a4548543906703
--- /dev/null
+++ b/chrome/browser/extensions/extension_garbage_collector_chromeos.cc
@@ -0,0 +1,85 @@
+// Copyright 2014 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 "chrome/browser/extensions/extension_garbage_collector_chromeos.h"
+
+#include "chrome/browser/chromeos/login/users/user_manager.h"
+#include "chrome/browser/extensions/extension_assets_manager_chromeos.h"
+#include "chrome/browser/extensions/extension_service.h"
+#include "extensions/browser/extension_system.h"
+
+namespace extensions {
+
+bool ExtensionGarbageCollectorChromeOS::shared_extensions_garbage_collected_ =
+    false;
+
+ExtensionGarbageCollectorChromeOS::ExtensionGarbageCollectorChromeOS(
+    content::BrowserContext* context)
+    : ExtensionGarbageCollector(context),
+      disable_garbage_collection_(false) {
+}
+
+ExtensionGarbageCollectorChromeOS::~ExtensionGarbageCollectorChromeOS() {}
+
+// static
+ExtensionGarbageCollectorChromeOS* ExtensionGarbageCollectorChromeOS::Get(
+    content::BrowserContext* context) {
+  return static_cast<ExtensionGarbageCollectorChromeOS*>(
+      ExtensionGarbageCollector::Get(context));
+}
+
+// static
+void ExtensionGarbageCollectorChromeOS::ClearGarbageCollectedForTesting() {
+  shared_extensions_garbage_collected_ = false;
+}
+
+void ExtensionGarbageCollectorChromeOS::GarbageCollectExtensions() {
+  if (disable_garbage_collection_)
+    return;
+
+  // Process per-profile extensions dir.
+  ExtensionGarbageCollector::GarbageCollectExtensions();
+
+  if (!shared_extensions_garbage_collected_ &&
+      CanGarbageCollectSharedExtensions()) {
+    GarbageCollectSharedExtensions();
+    shared_extensions_garbage_collected_ = true;
+  }
+}
+
+bool ExtensionGarbageCollectorChromeOS::CanGarbageCollectSharedExtensions() {
+  chromeos::UserManager* user_manager = chromeos::UserManager::Get();
+  if (!user_manager) {
+    NOTREACHED();
+    return false;
+  }
+
+  const chromeos::UserList& active_users = user_manager->GetLoggedInUsers();
+  for (size_t i = 0; i < active_users.size(); i++) {
+    Profile* profile = user_manager->GetProfileByUser(active_users[i]);
+    ExtensionGarbageCollectorChromeOS* gc =
+        ExtensionGarbageCollectorChromeOS::Get(profile);
+    if (gc->crx_installs_in_progress_ > 0)
+      return false;
+  }
+
+  return true;
+}
+
+void ExtensionGarbageCollectorChromeOS::GarbageCollectSharedExtensions() {
+  std::multimap<std::string, base::FilePath> paths;
+  if (ExtensionAssetsManagerChromeOS::CleanUpSharedExtensions(&paths)) {
+    ExtensionService* service =
+        ExtensionSystem::Get(context_)->extension_service();
+    if (!service->GetFileTaskRunner()->PostTask(
+            FROM_HERE,
+            base::Bind(&GarbageCollectExtensionsOnFileThread,
+                       ExtensionAssetsManagerChromeOS::GetSharedInstallDir(),
+                       paths))) {
+      NOTREACHED();
+    }
+  }
+}
+
+}  // namespace extensions