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 85 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::ClearCacheAndResetOnUIThread() {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+  RemoveDriveMountPoint();
+  docs_service()->CancelAll();
+  cache_->ClearAllOnUIThread(base::Bind(&GDataSystemService::ClearCacheAndReset,
+                                        base::Unretained(this)

[satorux1, 2012/08/01 20:50:31]

please use weak_ptr.

[yoshiki, 2012/08/01 21:44:59]

Done.

+                                        ));
+}
+
+void GDataSystemService::ClearCacheAndReset(

[satorux1, 2012/08/01 20:50:31]

The function name doesn't seem to match with what it does?

Maybe AddBackDrivemountPoint()?

[yoshiki, 2012/08/01 21:44:59]

Done.

+    GDataFileError error, const FilePath& file_path) {

[satorux1, 2012/08/01 20:50:31]

shouldn't we check |error|?

[yoshiki, 2012/08/01 21:44:59]

Done.

[yoshiki, 2012/08/01 23:07:58]

I was wrong in the patchset #2 and |error| is not a pointer. |error| is always
GDATA_FILE_OK so far. I added a TODO comment instead of checking.

+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+  AddDriveMountPoint();
+}
+
 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