Split out foreground session tracking from the application code.

chrome/android/java/src/org/chromium/chrome/browser/ChromeLifetimeController.java

Index: chrome/android/java/src/org/chromium/chrome/browser/ChromeLifetimeController.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/ChromeLifetimeController.java b/chrome/android/java/src/org/chromium/chrome/browser/ChromeLifetimeController.java
deleted file mode 100644
index 3e013c9fd61324da61fa1f05ca99d1d10a15a485..0000000000000000000000000000000000000000
--- a/chrome/android/java/src/org/chromium/chrome/browser/ChromeLifetimeController.java
+++ /dev/null
@@ -1,77 +0,0 @@
-// 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.
-
-package org.chromium.chrome.browser;
-
-import android.app.Activity;
-import android.content.Context;
-import android.content.Intent;
-import android.os.Process;
-
-import org.chromium.base.ActivityState;
-import org.chromium.base.ApplicationStatus;
-import org.chromium.base.ContextUtils;
-
-import java.lang.ref.WeakReference;
-
-/**
- * Answers requests to kill and (potentially) restart Chrome's main browser process.
- *
- * This class fires an Intent to start the {@link BrowserRestartActivity}, which will utltimately
- * kill the main browser process from its own process.
- *
- * https://crbug.com/515919 details why another Activity is used instead of using the AlarmManager.
- * https://crbug.com/545453 details why the BrowserRestartActivity handles the process killing.
- */
-class ChromeLifetimeController implements ApplicationLifetime.Observer,
-        ApplicationStatus.ActivityStateListener {
-    private static final String TAG = "LifetimeController";
-
-    private boolean mRestartChromeOnDestroy;
-    private int mRemainingActivitiesCount = 0;
-
-    public ChromeLifetimeController() {
-        ApplicationLifetime.addObserver(this);
-    }
-
-    @Override
-    public void onTerminate(boolean restart) {
-        mRestartChromeOnDestroy = restart;
-
-        for (WeakReference<Activity> weakActivity : ApplicationStatus.getRunningActivities()) {
-            Activity activity = weakActivity.get();
-            if (activity != null) {
-                ApplicationStatus.registerStateListenerForActivity(this, activity);
-                mRemainingActivitiesCount++;
-                activity.finish();
-            }
-        }
-
-        // Start the Activity that will ultimately kill this process.
-        fireBrowserRestartActivityIntent(BrowserRestartActivity.ACTION_START_WATCHDOG);
-    }
-
-    @Override
-    public void onActivityStateChange(Activity activity, int newState) {
-        assert mRemainingActivitiesCount > 0;
-        if (newState == ActivityState.DESTROYED) {
-            mRemainingActivitiesCount--;
-            if (mRemainingActivitiesCount == 0) {
-                fireBrowserRestartActivityIntent(BrowserRestartActivity.ACTION_KILL_PROCESS);
-            }
-        }
-    }
-
-    private void fireBrowserRestartActivityIntent(String action) {
-        Context context = ContextUtils.getApplicationContext();
-        Intent intent = new Intent();
-        intent.setAction(action);
-        intent.setClassName(
-                context.getPackageName(), BrowserRestartActivity.class.getName());
-        intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
-        intent.putExtra(BrowserRestartActivity.EXTRA_MAIN_PID, Process.myPid());
-        intent.putExtra(BrowserRestartActivity.EXTRA_RESTART, mRestartChromeOnDestroy);
-        context.startActivity(intent);
-    }
-}