Add a variations parameter to control WebAPK renderer launching.

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 3d124dd28e65de4639c82292f7b498a98e4f9d2d..7484e5f8813b548db8a5f84a6b34e32b390c4b13 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
@@ -37,7 +37,6 @@ import org.chromium.chrome.browser.metrics.MemoryUma;
 import org.chromium.chrome.browser.profiles.Profile;
 import org.chromium.chrome.browser.tabmodel.DocumentModeAssassin;
 import org.chromium.chrome.browser.upgrade.UpgradeActivity;
-import org.chromium.content.browser.ChildProcessCreationParams;
 import org.chromium.ui.base.DeviceFormFactor;
 
 import java.lang.reflect.Field;
@@ -125,7 +124,6 @@ public abstract class AsyncInitializationActivity extends AppCompatActivity impl
 
         // Kick off long running IO tasks that can be done in parallel.
         mNativeInitializationController = new NativeInitializationController(this);
-        initializeChildProcessCreationParams();
         mNativeInitializationController.startBackgroundTasks(shouldAllocateChildConnection());
     }
 
@@ -135,11 +133,6 @@ public abstract class AsyncInitializationActivity extends AppCompatActivity impl
         return true;
     }
 
-    /**
-     * Allow derived classes to initialize their own {@link ChildProcessCreationParams}.
-     */
-    protected void initializeChildProcessCreationParams() {}
-
     @Override
     public void postInflationStartup() {
         final View firstDrawView = getViewToBeDrawnBeforeInitializingNative();