Add usb_detachable_whitelist to device policy proto

chrome/browser/chromeos/policy/proto/chrome_device_policy.proto

Index: chrome/browser/chromeos/policy/proto/chrome_device_policy.proto
diff --git a/chrome/browser/chromeos/policy/proto/chrome_device_policy.proto b/chrome/browser/chromeos/policy/proto/chrome_device_policy.proto
index 508391952ea7f284626e99ba9e4b70f10f698c32..f41c43ef6d9b2ad155fd56f448e6118b9382f50f 100644
--- a/chrome/browser/chromeos/policy/proto/chrome_device_policy.proto
+++ b/chrome/browser/chromeos/policy/proto/chrome_device_policy.proto
@@ -655,6 +655,21 @@ message AllowKioskAppControlChromeVersionProto {
   optional bool allow_kiosk_app_control_chrome_version = 1 [default = false];
 }
 
+// Identifiers of a USB device or device family.
+message UsbDeviceIdProto {
+  // USB Vendor Identifier (aka idVendor).
+  optional int32 vendor_id = 1;
+  // USB Product Identifier (aka idProduct).
+  optional int32 product_id = 2;
+}
+
+// This setting contains the list of USB devices to detach from the kernel
+// drivers in order to use them in web application.

[bartfab (slow), 2016/02/29 12:20:31]

Nit: s/application/applications/

[vpalatin, 2016/03/01 01:42:17]

Done.

+// The list is used by the permission_broker daemon.
+message UsbDetachableWhitelistProto {
+  repeated UsbDeviceIdProto id = 1;
+}
+
 message ChromeDeviceSettingsProto {
   optional DevicePolicyRefreshRateProto device_policy_refresh_rate = 1;
   optional UserWhitelistProto user_whitelist = 2;
@@ -701,4 +716,5 @@ message ChromeDeviceSettingsProto {
   optional DisplayRotationDefaultProto display_rotation_default = 39;
   optional AllowKioskAppControlChromeVersionProto
       allow_kiosk_app_control_chrome_version = 40;
+  optional UsbDetachableWhitelistProto usb_detachable_whitelist = 41;
 }