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

extensions/browser/api/usb/usb_device_resource.h

Index: extensions/browser/api/usb/usb_device_resource.h
diff --git a/extensions/browser/api/usb/usb_device_resource.h b/extensions/browser/api/usb/usb_device_resource.h
index dfa4bf4dc6d7f33e1600258b2848b40c1619362f..ef9a7cc8f9b01d30b023602dfb8ff6fd59e745b0 100644
--- a/extensions/browser/api/usb/usb_device_resource.h
+++ b/extensions/browser/api/usb/usb_device_resource.h
@@ -5,36 +5,35 @@
 #ifndef EXTENSIONS_BROWSER_API_USB_USB_DEVICE_RESOURCE_H_
 #define EXTENSIONS_BROWSER_API_USB_USB_DEVICE_RESOURCE_H_
 
-#include <set>
 #include <string>
 
 #include "base/basictypes.h"
-#include "base/memory/linked_ptr.h"
 #include "base/memory/ref_counted.h"
 #include "base/synchronization/lock.h"
 #include "content/public/browser/browser_thread.h"
 #include "device/usb/usb_device_handle.h"
 #include "extensions/browser/api/api_resource.h"
 #include "extensions/browser/api/api_resource_manager.h"
-#include "extensions/common/api/usb.h"
 
-namespace net {
-class IOBuffer;
-}  // namespace net
+namespace usb_service {
+class UsbDeviceHandle;
+}
 
 namespace extensions {
 
 // A UsbDeviceResource is an ApiResource wrapper for a UsbDevice.
 class UsbDeviceResource : public ApiResource {
  public:
+  static const content::BrowserThread::ID kThreadId =
+      content::BrowserThread::FILE;
+
   UsbDeviceResource(const std::string& owner_extension_id,
                     scoped_refptr<device::UsbDeviceHandle> device);
   virtual ~UsbDeviceResource();
 
   scoped_refptr<device::UsbDeviceHandle> device() { return device_; }
 
-  static const content::BrowserThread::ID kThreadId =
-      content::BrowserThread::FILE;
+  virtual bool IsPersistent() const OVERRIDE;
 
  private:
   friend class ApiResourceManager<UsbDeviceResource>;