Make isolated file system works for a device root (e.g. X:\\)

chrome/browser/intents/device_attached_intent_source.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/intents/device_attached_intent_source.h"
 
 #include "base/file_path.h"
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_window.h"
@@ skipping 20 matching lines @@
 }
 
 void DeviceAttachedIntentSource::OnMediaDeviceAttached(
     const base::SystemMonitor::DeviceIdType& id,
     const std::string& name,
     const FilePath& device_path) {
   if (!browser_->window()->IsActive())
     return;
 
   // Sanity checks for |device_path|.
-  if (!device_path.IsAbsolute() || device_path.ReferencesParent() ||
-      device_path.BaseName().IsAbsolute() || device_path.BaseName().empty()) {
+  if (!device_path.IsAbsolute() || device_path.ReferencesParent()) {
     return;
   }
+  std::string device_name = fileapi::IsolatedContext::GetNameForPath(
+      device_path);
+  DCHECK(!device_name.empty());
 
   // Register device path as an isolated file system.
-  std::set<FilePath> fileset;
-  fileset.insert(device_path);
   const std::string filesystem_id =
-      fileapi::IsolatedContext::GetInstance()->
-          RegisterIsolatedFileSystem(fileset);
+      fileapi::IsolatedContext::GetInstance()->RegisterFileSystemForFile(
+          device_name, device_path);
+
   CHECK(!filesystem_id.empty());
   webkit_glue::WebIntentData intent(
       ASCIIToUTF16("chrome-extension://attach"),
       ASCIIToUTF16("chrome-extension://filesystem"),
-      device_path,
+      device_name,
       filesystem_id);
 
   content::WebIntentsDispatcher* dispatcher =
       content::WebIntentsDispatcher::Create(intent);
   delegate_->WebIntentDispatch(NULL, dispatcher);
 }