Separate deferred startup into tasks.

chrome/android/java/src/org/chromium/chrome/browser/init/AsyncInitializationActivity.java

Index: chrome/android/java/src/org/chromium/chrome/browser/init/AsyncInitializationActivity.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/init/AsyncInitializationActivity.java b/chrome/android/java/src/org/chromium/chrome/browser/init/AsyncInitializationActivity.java
index 30b6da5c8e60fd43717c3dd1205e603c0a78c75c..1a51e0505bfdb5e50e7de05fd57c91c9ed66e3f6 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/init/AsyncInitializationActivity.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/init/AsyncInitializationActivity.java
@@ -28,6 +28,7 @@ import org.chromium.base.VisibleForTesting;
 import org.chromium.base.library_loader.LoaderErrors;
 import org.chromium.base.library_loader.ProcessInitException;
 import org.chromium.chrome.browser.ChromeApplication;
+import org.chromium.chrome.browser.DeferredStartupHandler;
 import org.chromium.chrome.browser.WarmupManager;
 import org.chromium.chrome.browser.metrics.MemoryUma;
 import org.chromium.chrome.browser.profiles.Profile;
@@ -182,9 +183,12 @@ public abstract class AsyncInitializationActivity extends AppCompatActivity impl
     /**
      * Actions that may be run at some point after startup. Place tasks that are not critical to the
      * startup path here.  This method will be called automatically and should not be called
-     * directly by subclasses.  Overriding methods should call super.onDeferredStartup().
+     * directly by subclasses.  Overriding methods should call super.onDeferredStartup() last, after
+     * queuing their tasks on the DeferredStartupHandler.
      */
-    protected void onDeferredStartup() { }
+    protected void onDeferredStartup() {
+        DeferredStartupHandler.getInstance().runDeferredTasks();

[Yaron, 2016/07/06 14:27:50]

does this work? previously this was kicked off in ChromeActivity but I don't
think everything subclasses this activity. I think the asyncness of
"AsyncInitializationActivity" is "async library load" and not whether it uses
deferredstartuphandler

[Peter Wen, 2016/07/06 15:21:37]

Moved this to ChromeActivity. Only ChromeActivity and its subclass
ChromeTabbedActivity use this method.

[Yaron, 2016/07/06 15:46:58]

Err, I was completely backwards on this :/
ChromeActivity directly subclasses asyncInitActivity
I still prefer it how you have it now

[Peter Wen, 2016/07/06 16:05:46]

Acknowledged.

+    }
 
     @Override
     public void onStartupFailure() {