Add a chrome://webapks page.

chrome/browser/ui/webui/webapk_info_callback.cc

+// Copyright 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.
+
+#include "chrome/browser/ui/webui/webapk_info_callback.h"
+
+#include <jni.h>
+#include <string>
+
+#include "base/android/jni_android.h"
+#include "base/android/jni_string.h"
+#include "jni/WebApkInfoCallback_jni.h"
+
+using base::android::JavaParamRef;
+
+WebApkInfoCallback::WebApkInfoCallback(
+    const base::RepeatingCallback<void(std::string, std::string, int, int)>&
+        callback)
+    : callback_(callback),
+      j_webapk_info_callback_(
+          Java_WebApkInfoCallback_create(base::android::AttachCurrentThread(),
+                                         reinterpret_cast<uintptr_t>(this))) {}
+
+WebApkInfoCallback::~WebApkInfoCallback() {}
+
+void WebApkInfoCallback::Destroy(JNIEnv* env,
+                                 const JavaParamRef<jobject>& obj) {
+  delete this;
+}
+
+void WebApkInfoCallback::MakeInfoRequest(JNIEnv* env) {
+  Java_WebApkInfoCallback_listWebApks(env, j_webapk_info_callback_);
+}
+
+void WebApkInfoCallback::OnWebApkFound(
+    JNIEnv* env,
+    const JavaParamRef<jobject>& obj,
+    const base::android::JavaParamRef<jstring>& j_name,
+    const base::android::JavaParamRef<jstring>& j_package_name,
+    const jint j_shell_apk_version,
+    const jint j_version_code) const {
+  std::string name = base::android::ConvertJavaStringToUTF8(env, j_name);
+  std::string package_name =
+      base::android::ConvertJavaStringToUTF8(env, j_package_name);
+  int shell_apk_version = static_cast<int>(j_shell_apk_version);
+  int version_code = static_cast<int>(j_version_code);
+  callback_.Run(name, package_name, shell_apk_version, version_code);
+}
+
+// static
+bool WebApkInfoCallback::Register(JNIEnv* env) {
+  return RegisterNativesImpl(env);
+}