Expose the Site Engagement Service to Java.

chrome/browser/engagement/site_engagement_service_android.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 "chrome/browser/engagement/site_engagement_service_android.h"
+
+#include "base/android/jni_android.h"
+#include "base/android/jni_string.h"
+#include "base/memory/ptr_util.h"
+#include "chrome/browser/profiles/profile_android.h"
+#include "jni/SiteEngagementService_jni.h"
+#include "url/gurl.h"
+
+using base::android::JavaParamRef;
+
+// static
+bool SiteEngagementServiceAndroid::Register(JNIEnv* env) {
+  return RegisterNativesImpl(env);
+}
+
+// static
+SiteEngagementServiceAndroid* SiteEngagementServiceAndroid::GetOrCreate(
+    JNIEnv* env,
+    const JavaParamRef<jobject>& obj,
+    SiteEngagementService* service) {
+  SiteEngagementServiceAndroid* android_service = service->GetAndroidService();
+  if (!android_service) {
+    service->SetAndroidService(
+        base::MakeUnique<SiteEngagementServiceAndroid>(env, obj, service));
+    android_service = service->GetAndroidService();
+  }
+
+  return android_service;
+}
+
+SiteEngagementServiceAndroid::SiteEngagementServiceAndroid(
+    JNIEnv* env,
+    const JavaParamRef<jobject>& obj,
+    SiteEngagementService* service)
+    : obj_(env, obj), service_(service) {}
+
+SiteEngagementServiceAndroid::~SiteEngagementServiceAndroid() {
+  Java_SiteEngagementService_onNativeDestroyed(
+      base::android::AttachCurrentThread(), obj_);
+}
+
+double SiteEngagementServiceAndroid::GetScore(
+    JNIEnv* env,
+    const JavaParamRef<jobject>& obj,
+    const JavaParamRef<jstring>& jurl) {
+  if (!jurl)
+    return 0;
+
+  return service_->GetScore(
+      GURL(base::android::ConvertJavaStringToUTF16(env, jurl)));
+}
+
+void SiteEngagementServiceAndroid::ResetScoreForURL(
+    JNIEnv* env,
+    const JavaParamRef<jobject>& obj,
+    const JavaParamRef<jstring>& jurl,
+    double score) {
+  if (jurl) {
+    service_->ResetScoreForURL(
+        GURL(base::android::ConvertJavaStringToUTF16(env, jurl)), score);
+  }
+}
+
+jlong GetForProfile(JNIEnv* env,
+                    const JavaParamRef<jobject>& obj,
+                    const JavaParamRef<jobject>& jprofile) {
+  Profile* profile = ProfileAndroid::FromProfileAndroid(jprofile);
+  SiteEngagementService* service = SiteEngagementService::Get(profile);
+  DCHECK(service);
+
+  return reinterpret_cast<uintptr_t>(
+      SiteEngagementServiceAndroid::GetOrCreate(env, obj, service));
+}