Mark HID and USB device connections as non-persistent API resources.

extensions/browser/api/hid/hid_connection_resource.h

 // 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.
 
 #ifndef EXTENSIONS_BROWSER_API_HID_HID_CONNECTION_RESOURCE_H_
 #define EXTENSIONS_BROWSER_API_HID_HID_CONNECTION_RESOURCE_H_
 
 #include <string>
 
 #include "base/memory/ref_counted.h"
 #include "content/public/browser/browser_thread.h"
 #include "device/hid/hid_connection.h"
 #include "extensions/browser/api/api_resource.h"
 #include "extensions/browser/api/api_resource_manager.h"
 
+namespace device {
+class HidConnection;
+}
+
 namespace extensions {
 
 class HidConnectionResource : public ApiResource {
  public:
+  static const content::BrowserThread::ID kThreadId =
+      content::BrowserThread::FILE;
+
   HidConnectionResource(const std::string& owner_extension_id,
                         scoped_refptr<device::HidConnection> connection);
   virtual ~HidConnectionResource();
 
   scoped_refptr<device::HidConnection> connection() const {
     return connection_;
   }
 
+  virtual bool IsPersistent() const OVERRIDE;
+
   static const char* service_name() { return "HidConnectionResourceManager"; }
 
-  static const content::BrowserThread::ID kThreadId =
-      content::BrowserThread::FILE;
-
  private:
   scoped_refptr<device::HidConnection> connection_;
 
   DISALLOW_COPY_AND_ASSIGN(HidConnectionResource);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_BROWSER_API_HID_HID_CONNECTION_RESOURCE_H_