Destroy incognito profile from close all incognito notification.

content/public/android/java/src/org/chromium/content/browser/BrowserStartupController.java

Index: content/public/android/java/src/org/chromium/content/browser/BrowserStartupController.java
diff --git a/content/public/android/java/src/org/chromium/content/browser/BrowserStartupController.java b/content/public/android/java/src/org/chromium/content/browser/BrowserStartupController.java
index 8f06eb5736ed8ff1bc5e21a90902fdb87de55144..3836fdae308dd0b8998ffeb6b138053c3bbe319b 100644
--- a/content/public/android/java/src/org/chromium/content/browser/BrowserStartupController.java
+++ b/content/public/android/java/src/org/chromium/content/browser/BrowserStartupController.java
@@ -226,6 +226,14 @@ public class BrowserStartupController {
         return ContentMain.start();
     }
 
+    /**
+     * @return Whether the browser process completed successfully.
+     */
+    public boolean isStartupSuccessfullyCompleted() {
+        ThreadUtils.assertOnUiThread();
+        return mStartupDone && mStartupSuccess;
+    }
+
     public void addStartupCompletedObserver(StartupCallback callback) {
         ThreadUtils.assertOnUiThread();
         if (mStartupDone) {