Execute operations of ChildProcessLauncher on launcher thread

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

Index: chrome/android/java/src/org/chromium/chrome/browser/init/NativeInitializationController.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/init/NativeInitializationController.java b/chrome/android/java/src/org/chromium/chrome/browser/init/NativeInitializationController.java
index d1866eda7d1ba96c6f81dd1e41a8a3896d20e6d2..53c0dead1302b2048dbd33ffacb855f5cf0990f7 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/init/NativeInitializationController.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/init/NativeInitializationController.java
@@ -6,11 +6,11 @@ package org.chromium.chrome.browser.init;
 
 import android.content.Context;
 import android.content.Intent;
+import android.os.AsyncTask;
 import android.os.Handler;
 import android.os.Looper;
 import android.util.Log;
 
-import org.chromium.base.ThreadUtils;
 import org.chromium.base.library_loader.LibraryLoader;
 import org.chromium.base.library_loader.LibraryProcessType;
 import org.chromium.base.library_loader.ProcessInitException;
@@ -73,10 +73,9 @@ class NativeInitializationController {
      * process.
      */
     public void startBackgroundTasks() {
-        // TODO(yusufo) : Investigate using an AsyncTask for this.

[Yaron, 2015/09/16 01:20:16]

Sorry if I was unclear - I actually meant this is fine to leave as-is since it
has a TODO to fix which is good but I don't think it should be done in the same
CL. The other related changes are very straightforward and make sense to
include.

[Jaekyun Seok (inactive), 2015/09/16 01:46:48]

Reverted.

-        new Thread() {
+        new AsyncTask<Void, Void, Boolean>() {
             @Override
-            public void run() {
+            public Boolean doInBackground(Void... params) {
                 try {
                     LibraryLoader libraryLoader =
                             LibraryLoader.get(LibraryProcessType.PROCESS_BROWSER);
@@ -95,17 +94,17 @@ class NativeInitializationController {
                 } catch (ProcessInitException e) {
                     Log.e(TAG, "Unable to load native library.", e);
                     mActivityDelegate.onStartupFailure();
-                    return;
+                    return false;
                 }
                 ChildProcessLauncher.warmUp(mContext);
-                ThreadUtils.runOnUiThread(new Runnable() {
-                    @Override
-                    public void run() {
-                        onLibraryLoaded();
-                    }
-                });
+                return true;
             }
-        }.start();
+
+            @Override
+            protected void onPostExecute(Boolean result) {
+                if (result) onLibraryLoaded();
+            }
+        }.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR);
     }
 
     private void onLibraryLoaded() {