Drive: Adds clearDriveCache API to file_browser_private.

chrome/browser/chromeos/extensions/file_browser_private_api.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/extensions/file_browser_private_api.h"
 
 #include <utility>
 
 #include "base/base64.h"
 #include "base/bind.h"
@@ skipping 2347 matching lines @@
     entry->SetString("fileFullPath", "/" + results->at(i).path.value());
     entry->SetBoolean("fileIsDirectory", results->at(i).is_directory);
 
     entries->Append(entry);
   }
 
   SetResult(entries);
   SendResponse(true);
 }
 
+bool ClearDriveCacheFunction::RunImpl() {
+  gdata::GDataSystemService* system_service =
+      gdata::GDataSystemServiceFactory::GetForProfile(profile_);
+  // |system_service| is NULL if incognito window / guest login.
+  if (!system_service || !system_service->file_system())
+    return false;
+
+  // TODO(yoshiki): Receive a callback from JS-side and pass it to
+  // ClearCacheAndRemountFileSystem(). http://crbug.com/140511
+  system_service->ClearCacheAndRemountFileSystem(base::Callback<void(bool)>());
+
+  SendResponse(true);
+  return true;
+}
+
 bool GetNetworkConnectionStateFunction::RunImpl() {
   chromeos::NetworkLibrary* network_library =
       chromeos::CrosLibrary::Get()->GetNetworkLibrary();
   if (!network_library)
     return false;
 
   const chromeos::Network* active_network = network_library->active_network();
 
   scoped_ptr<DictionaryValue> value(new DictionaryValue());
   value->SetBoolean("online", active_network && active_network->online());
@@ skipping 20 matching lines @@
   gdata::GDataSystemService* system_service =
       gdata::GDataSystemServiceFactory::GetForProfile(profile_);
   if (!system_service || !system_service->file_system())
     return false;
 
   FilePath directory_path = GetVirtualPathFromURL(GURL(file_url_as_string));
   system_service->file_system()->RequestDirectoryRefresh(directory_path);
 
   return true;
 }