Add component for feature engagement tracking.

components/feature_engagement_tracker/internal/android/feature_engagement_tracker_impl_android.h

Index: components/feature_engagement_tracker/internal/android/feature_engagement_tracker_impl_android.h
diff --git a/components/feature_engagement_tracker/internal/android/feature_engagement_tracker_impl_android.h b/components/feature_engagement_tracker/internal/android/feature_engagement_tracker_impl_android.h
new file mode 100644
index 0000000000000000000000000000000000000000..819d6c108c56f80d09580296737f1e9f8d6c2352
--- /dev/null
+++ b/components/feature_engagement_tracker/internal/android/feature_engagement_tracker_impl_android.h
@@ -0,0 +1,59 @@
+// 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.
+
+#ifndef COMPONENTS_FEATURE_ENGAGEMENT_TRACKER_INTERNAL_ANDROID_FEATURE_ENGAGEMENT_TRACKER_IMPL_ANDROID_H_
+#define COMPONENTS_FEATURE_ENGAGEMENT_TRACKER_INTERNAL_ANDROID_FEATURE_ENGAGEMENT_TRACKER_IMPL_ANDROID_H_
+
+#include "base/android/callback_android.h"
+#include "base/android/jni_android.h"
+#include "base/android/scoped_java_ref.h"
+#include "base/macros.h"
+#include "components/feature_engagement_tracker/internal/feature_engagement_tracker_impl.h"
+
+namespace feature_engagement_tracker {
+
+// JNI bridge between FeatureEngagementTrackerImpl in Java and C++. See the
+// public API of FeatureEngagementTracker for documentation for all methods
+// where the name in this class has a "Java"-suffix.
+class FeatureEngagementTrackerImplAndroid
+    : public FeatureEngagementTrackerImpl {
+ public:
+  static bool RegisterJni(JNIEnv* env);
+  static FeatureEngagementTrackerImplAndroid* FromJavaObject(
+      JNIEnv* env,
+      const base::android::JavaRef<jobject>& jobj);
+
+  FeatureEngagementTrackerImplAndroid();
+  ~FeatureEngagementTrackerImplAndroid() override;
+
+  base::android::ScopedJavaLocalRef<jobject> GetJavaObject();
+
+  // FeatureEngagementTracker JNI bridge implementation.
+  virtual void EventJava(
+      JNIEnv* env,
+      const base::android::JavaRef<jobject>& jobj,
+      const base::android::JavaParamRef<jstring>& jfeature,
+      const base::android::JavaParamRef<jstring>& jprecondition);
+  virtual void UsedJava(JNIEnv* env,
+                        const base::android::JavaRef<jobject>& jobj,
+                        const base::android::JavaParamRef<jstring>& jfeature);
+  virtual bool TriggerJava(
+      JNIEnv* env,
+      const base::android::JavaRef<jobject>& jobj,
+      const base::android::JavaParamRef<jstring>& jfeature);
+  virtual void DismissedJava(JNIEnv* env,
+                             const base::android::JavaRef<jobject>& jobj);
+  virtual void AddOnInitializedCallbackJava(
+      JNIEnv* env,
+      const base::android::JavaRef<jobject>& jobj,
+      const base::android::JavaParamRef<jobject>& j_callback_obj);
+
+ private:
+  base::android::ScopedJavaGlobalRef<jobject> java_obj_;
+  DISALLOW_COPY_AND_ASSIGN(FeatureEngagementTrackerImplAndroid);
+};
+
+}  // namespace feature_engagement_tracker
+
+#endif  // COMPONENTS_FEATURE_ENGAGEMENT_TRACKER_INTERNAL_ANDROID_FEATURE_ENGAGEMENT_TRACKER_IMPL_ANDROID_H_