[webnfc] Add default implementation for nfc mojo service.

device/nfc/nfc_impl_default.cc

+// Copyright 2016 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.
+
+#include "device/nfc/nfc_impl.h"
+
+#include "base/logging.h"
+#include "mojo/public/cpp/bindings/strong_binding.h"
+
+namespace device {
+
+namespace {
+
+class NFCDefaultImpl : public NFC {
+ public:
+  void SetClient(NFCClientPtr client) override { NOTIMPLEMENTED(); }
+
+  void Push(NFCMessagePtr message,
+            NFCPushOptionsPtr options,
+            const PushCallback& callback) override {
+    callback.Run(NotSupported());
+    NOTIMPLEMENTED();
+  }
+
+  void CancelPush(NFCPushTarget target,
+                  const CancelPushCallback& callback) override {
+    callback.Run(NotSupported());
+    NOTIMPLEMENTED();
+  }
+
+  void Watch(NFCWatchOptionsPtr options,
+             const WatchCallback& callback) override {
+    callback.Run(0, NotSupported());
+    NOTIMPLEMENTED();
+  }
+
+  void CancelWatch(uint32_t id, const CancelWatchCallback& callback) override {
+    callback.Run(NotSupported());
+    NOTIMPLEMENTED();
+  }
+
+  void CancelAllWatches(const CancelAllWatchesCallback& callback) override {
+    callback.Run(NotSupported());
+    NOTIMPLEMENTED();
+  }
+
+  void SuspendNFCOperations() override { NOTIMPLEMENTED(); }
+  void ResumeNFCOperations() override { NOTIMPLEMENTED(); }
+
+ private:
+  friend NFCImpl;
+
+  NFCErrorPtr NotSupported() {
+    NFCErrorPtr error = NFCError::New();
+    error->error_type = NFCErrorType::NOT_SUPPORTED;
+    return error;
+  }
+
+  explicit NFCDefaultImpl(mojo::InterfaceRequest<NFC> request)
+      : binding_(this, std::move(request)) {}
+  ~NFCDefaultImpl() override {}
+
+  mojo::StrongBinding<NFC> binding_;
+
+  DISALLOW_COPY_AND_ASSIGN(NFCDefaultImpl);
+};
+
+}  // namespace
+
+// static
+void NFCImpl::Create(mojo::InterfaceRequest<NFC> request) {
+  new NFCDefaultImpl(std::move(request));
+}
+
+}  // namespace device