Add Digital Asset Links verification for postMessage API

chrome/browser/android/customtabs/origin_verifier.h

Index: chrome/browser/android/customtabs/origin_verifier.h
diff --git a/chrome/browser/android/customtabs/origin_verifier.h b/chrome/browser/android/customtabs/origin_verifier.h
new file mode 100644
index 0000000000000000000000000000000000000000..a78ae538324344aafedaee8460167b52275896ef
--- /dev/null
+++ b/chrome/browser/android/customtabs/origin_verifier.h
@@ -0,0 +1,48 @@
+// Copyright (c) 2017 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.
+
+#ifndef CHROME_BROWSER_ANDROID_CUSTOMTABS_ORIGIN_VERIFIER_H_
+#define CHROME_BROWSER_ANDROID_CUSTOMTABS_ORIGIN_VERIFIER_H_
+
+#include "base/android/jni_weak_ref.h"
+#include "components/digital_asset_links/digital_asset_links_handler.h"
+#include "net/url_request/url_fetcher.h"
+#include "net/url_request/url_fetcher_delegate.h"
+#include "net/url_request/url_request_context_getter.h"
+
+namespace base {
+class DictionaryValue;
+}
+
+namespace customtabs {
+
+class OriginVerifier : public digital_asset_links::AssetLinkListener {
+ public:
+  explicit OriginVerifier(JNIEnv* env, jobject obj);
+  ~OriginVerifier() override;
+
+  void VerifyOrigin(JNIEnv* env,
+                    const base::android::JavaParamRef<jobject>& obj,
+                    const base::android::JavaParamRef<jstring>& j_package_name,
+                    const base::android::JavaParamRef<jstring>& j_fingerprint,
+                    const base::android::JavaParamRef<jstring>& j_origin);
+  void Destroy(JNIEnv* env, const base::android::JavaRef<jobject>& obj);
+
+  // chrome::AssetLinksListener
+  void OnRelationshipCheckComplete(
+      const base::DictionaryValue* response) override;
+
+ private:
+  std::unique_ptr<digital_asset_links::DigitalAssetLinksHandler>
+      asset_link_handler_;
+
+  base::android::ScopedJavaGlobalRef<jobject> jobject_;
+
+  DISALLOW_COPY_AND_ASSIGN(OriginVerifier);
+};
+
+bool RegisterOriginVerifier(JNIEnv* env);
+}  // namespace customtabs
+
+#endif  // CHROME_BROWSER_ANDROID_CUSTOMTABS_ORIGIN_VERIFIER_H_