| // Copyright 2015 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_METRICS_UMA_SESSION_STATS_H_ |
| #define CHROME_BROWSER_ANDROID_METRICS_UMA_SESSION_STATS_H_ |
| |
| #include <jni.h> |
| #include <stdint.h> |
| |
| #include <memory> |
| #include <string> |
| #include <vector> |
| |
| #include "base/android/scoped_java_ref.h" |
| #include "base/macros.h" |
| #include "base/time/time.h" |
| |
| // The native part of java UmaSessionStats class. |
| class UmaSessionStats { |
| public: |
| UmaSessionStats(); |
| |
| void UmaResumeSession(JNIEnv* env, |
| const base::android::JavaParamRef<jobject>& obj); |
| void UmaEndSession(JNIEnv* env, |
| const base::android::JavaParamRef<jobject>& obj); |
| |
| static void RegisterSyntheticFieldTrial(const std::string& trial_name, |
| const std::string& group_name); |
| |
| static void RegisterSyntheticMultiGroupFieldTrial( |
| const std::string& trial_name, |
| const std::vector<uint32_t>& group_name_hashes); |
| |
| private: |
| ~UmaSessionStats(); |
| |
| // Start of the current session, used for UMA. |
| base::TimeTicks session_start_time_; |
| int active_session_count_; |
| |
| DISALLOW_COPY_AND_ASSIGN(UmaSessionStats); |
| }; |
| |
| #endif // CHROME_BROWSER_ANDROID_METRICS_UMA_SESSION_STATS_H_ |