Upstream: ChildProcessLauncher connects renderer processes of WebAPKs.

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

 // 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.init;
 
 import android.app.Activity;
 import android.content.Context;
 import android.content.Intent;
 import android.content.res.Configuration;
@@ skipping 90 matching lines @@
         // This is done here before kicking long running I/O because inflation includes accessing
         // resource files(xmls etc) even if we are inflating views defined by the framework. If this
         // operation gets blocked because other long running I/O are running, we delay onCreate(),
         // onStart() and first draw consequently.
 
         setContentView();
         if (mLaunchBehindWorkaround != null) mLaunchBehindWorkaround.onSetContentView();
 
         // Kick off long running IO tasks that can be done in parallel.
         mNativeInitializationController = new NativeInitializationController(this, this);
+        initializeChildProcessCreationParams();
         mNativeInitializationController.startBackgroundTasks();
     }
 
+    /**
+     * Allow derived classes to initialize their own {@link ChildProcessCreationParams}.
+     */
+    protected void initializeChildProcessCreationParams() {}
+
     @Override
     public void postInflationStartup() {
         final View firstDrawView = getViewToBeDrawnBeforeInitializingNative();
         assert firstDrawView != null;
         ViewTreeObserver.OnPreDrawListener firstDrawListener =
                 new ViewTreeObserver.OnPreDrawListener() {
             @Override
             public boolean onPreDraw() {
                 firstDrawView.getViewTreeObserver().removeOnPreDrawListener(this);
                 onFirstDrawComplete();
@@ skipping 364 matching lines @@
                             getDecorView().setVisibility(View.GONE);
                         }
                         getViewTreeObserver().removeOnPreDrawListener(mPreDrawListener);
                     }
                 });
                 return true;
             }
         };
     }
 }