Drive: add a method to clear all local cache.

chrome/browser/chromeos/gdata/gdata_system_service.cc

 // Copyright (c) 2012 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/chromeos/gdata/gdata_system_service.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/chromeos/gdata/drive_webapps_registry.h"
@@ skipping 21 matching lines @@
 namespace {
 
 // Used in test to setup system service.
 DocumentsServiceInterface* g_test_documents_service = NULL;
 const std::string* g_test_cache_root = NULL;
 
 }  // namespace
 
 GDataSystemService::GDataSystemService(Profile* profile)
     : profile_(profile),
-      cache_(NULL) {
+      cache_(NULL),
+      ALLOW_THIS_IN_INITIALIZER_LIST(weak_ptr_factory_(this)) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   base::SequencedWorkerPool* blocking_pool = BrowserThread::GetBlockingPool();
   blocking_task_runner_ = blocking_pool->GetSequencedTaskRunner(
       blocking_pool->GetSequenceToken());
 }
 
 GDataSystemService::~GDataSystemService() {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   cache_->DestroyOnUIThread();
 }
@@ skipping 43 matching lines @@
   // Shut down the member objects in the reverse order of creation.
   contacts_service_.reset();
   sync_client_.reset();
   download_observer_.reset();
   file_system_.reset();
   webapps_registry_.reset();
   uploader_.reset();
   documents_service_.reset();
 }
 
+void GDataSystemService::ClearCache(
+    const base::Callback<void(bool)>& callback) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+
+  RemoveDriveMountPoint();
+  docs_service()->CancelAll();
+  cache_->ClearAllOnUIThread(
+      base::Bind(&GDataSystemService::AddBackDriveMountPoint,
+                 weak_ptr_factory_.GetWeakPtr(),
+                 callback));
+}
+
+void GDataSystemService::AddBackDriveMountPoint(
+    const base::Callback<void(bool)>& callback,
+    GDataFileError error,
+    const FilePath& file_path) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+
+  AddDriveMountPoint();
+
+  if (!callback.is_null())
+    callback.Run(error == GDATA_FILE_OK);
+}
+
 void GDataSystemService::AddDriveMountPoint() {
   if (!gdata::util::IsGDataAvailable(profile_))
     return;
 
   const FilePath mount_point = gdata::util::GetGDataMountPointPath();
   fileapi::ExternalFileSystemMountPointProvider* provider =
       BrowserContext::GetFileSystemContext(profile_)->external_provider();
   if (provider && !provider->HasMountPoint(mount_point)) {
     provider->AddRemoteMountPoint(
         mount_point,
@@ skipping 68 matching lines @@
       g_test_cache_root ? FilePath(*g_test_cache_root) :
                           GDataCache::GetCacheRootPath(profile);
   delete g_test_cache_root;
   g_test_cache_root = NULL;
 
   service->Initialize(documents_service, cache_root);
   return service;
 }
 
 }  // namespace gdata