Switch HidDeviceId from IORegistry path to IORegistry entry ID.

device/hid/hid_device_filter_unittest.cc

Index: device/hid/hid_device_filter_unittest.cc
diff --git a/device/hid/hid_device_filter_unittest.cc b/device/hid/hid_device_filter_unittest.cc
index 233cb2c228600d754e2aa4336513a99f042888d5..b829a6931e80cb3aa508ea9bd1be709a76f3a9c0 100644
--- a/device/hid/hid_device_filter_unittest.cc
+++ b/device/hid/hid_device_filter_unittest.cc
@@ -9,11 +9,22 @@
 
 namespace device {
 
+namespace {
+
+#if defined(OS_MACOSX)
+const uint64_t kTestDeviceId = 42;
+#else
+const char* kTestDeviceId = "device1";
+#endif
+
+}  // namespace
+
 class HidFilterTest : public testing::Test {
  public:
   void SetUp() override {
     device_info_ = new HidDeviceInfo(
-        "device1", 0x046d, 0xc31c, "Test Keyboard", "123ABC", kHIDBusTypeUSB,
+        kTestDeviceId, 0x046d, 0xc31c, "Test Keyboard", "123ABC",
+        kHIDBusTypeUSB,
         std::vector<uint8>(kKeyboard, kKeyboard + kKeyboardSize));
   }