android: Allow registering multiple CreationParams

chrome/android/java/templates/MonochromeApplication.template

 // Copyright 2016 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 {{package}};
 
 import android.content.Context;
 
 import com.android.webview.chromium.MonochromeLibraryPreloader;
 
 import org.chromium.base.library_loader.LibraryLoader;
 import org.chromium.base.library_loader.LibraryProcessType;
 import org.chromium.content.browser.ChildProcessCreationParams;
 
 /**
  * This is Application class for Monochrome.
  *
  * You shouldn't add anything else in this file, this class is split off from
  * normal chrome in order to access Android system API through Android WebView
  * glue layer and have monochrome specific code.
  */
 public class {{ monochrome_application_class }} extends {{ super_class }} {
-    private ChildProcessCreationParams mChildProcessCreationParams;
-
-    @Override
-    public ChildProcessCreationParams getChildProcessCreationParams() {
-        return mChildProcessCreationParams;
-    }
-
     @Override
     public void onCreate() {
         super.onCreate();
         LibraryLoader.setNativeLibraryPreloader(new MonochromeLibraryPreloader());
         // ChildProcessCreationParams is only needed for browser process, though it is
         // created and set in all processes.
-        mChildProcessCreationParams = new ChildProcessCreationParams(getPackageName(),
-                true /* isExternalService */, LibraryProcessType.PROCESS_CHILD);
-        ChildProcessCreationParams.set(mChildProcessCreationParams);
+        ChildProcessCreationParams.registerDefault(
+            new ChildProcessCreationParams(getPackageName(),
+                                           true /* isExternalService */,
+                                           LibraryProcessType.PROCESS_CHILD));
     }
 }