android: Post warmup to launcher thread

android_webview/java/src/org/chromium/android_webview/AwBrowserProcess.java

 // Copyright 2012 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.android_webview;
 
 import android.content.ComponentName;
 import android.content.Context;
 import android.content.Intent;
 import android.content.ServiceConnection;
@@ skipping 79 matching lines @@
         tryObtainingDataDirLock(appContext);
         // We must post to the UI thread to cover the case that the user
         // has invoked Chromium startup by using the (thread-safe)
         // CookieManager rather than creating a WebView.
         ThreadUtils.runOnUiThreadBlocking(new Runnable() {
             @Override
             public void run() {
                 boolean multiProcess = CommandLine.getInstance().hasSwitch(
                         AwSwitches.WEBVIEW_SANDBOXED_RENDERER);
                 if (multiProcess) {
-                    // Have a background thread warm up a renderer process now, so that this can
-                    // proceed in parallel to the browser process initialisation.
-                    AsyncTask.THREAD_POOL_EXECUTOR.execute(new Runnable() {
-                        @Override
-                        public void run() {
-                            ChildProcessLauncher.warmUp(appContext);
-                        }
-                    });
+                    ChildProcessLauncher.warmUp(appContext);
                 }
                 // The policies are used by browser startup, so we need to register the policy
                 // providers before starting the browser process. This only registers java objects
                 // and doesn't need the native library.
                 CombinedPolicyProvider.get().registerProvider(new AwPolicyProvider(appContext));
 
                 // Check android settings but only when safebrowsing is enabled.
                 AwSafeBrowsingConfigHelper.maybeInitSafeBrowsingFromSettings(appContext);
 
                 try {
@@ skipping 119 matching lines @@
                     public void onServiceDisconnected(ComponentName className) {}
                 };
                 if (!appContext.bindService(intent, connection, Context.BIND_AUTO_CREATE)) {
                     Log.w(TAG, "Could not bind to Minidump-copying Service " + intent);
                 }
                 return null;
             }
         }.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR);
     }
 }