Block some HID devices from chrome.hid.

chrome/browser/extensions/api/hid/hid_device_manager.h

Index: chrome/browser/extensions/api/hid/hid_device_manager.h
diff --git a/chrome/browser/extensions/api/hid/hid_device_manager.h b/chrome/browser/extensions/api/hid/hid_device_manager.h
index 84a6e3022e5335c59a3d9551473bdb96714fa6fe..c0abedd0ccf694446880e72057260401a4f15efa 100644
--- a/chrome/browser/extensions/api/hid/hid_device_manager.h
+++ b/chrome/browser/extensions/api/hid/hid_device_manager.h
@@ -44,6 +44,15 @@ class HidDeviceManager : public BrowserContextKeyedAPI {
 
   void UpdateDevices();
 
+  // Determines if a given device interface should be accessible to API
+  // consumers. In order for a device interface to be accessible, ALL of its
+  // specified usages must be accessible.
+  static bool IsDeviceAccessible(const device::HidDeviceInfo& device_info);
+
+  // Determines if a given usage is available to API consumers. This is used to
+  // blacklist usages which could be security or privacy concerns.
+  static bool IsUsageAccessible(const device::HidUsageAndPage& usage_and_page);
+
   base::ThreadChecker thread_checker_;
 
   int next_resource_id_;