android: Post warmup to launcher thread

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

Index: chrome/android/java/src/org/chromium/chrome/browser/init/AsyncInitTaskRunner.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/init/AsyncInitTaskRunner.java b/chrome/android/java/src/org/chromium/chrome/browser/init/AsyncInitTaskRunner.java
index 4ad3136de67419162bb3d4829bf50359e985df02..2fc7507548be36c441604bec311928253fc4c7b7 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/init/AsyncInitTaskRunner.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/init/AsyncInitTaskRunner.java
@@ -36,9 +36,9 @@ public abstract class AsyncInitTaskRunner {
         return ChromeVersionInfo.isOfficialBuild();
     }
 
-    private class LoadTask extends AsyncTask<Boolean, Void, Boolean> {
+    private class LoadTask extends AsyncTask<Void, Void, Boolean> {
         @Override
-        protected Boolean doInBackground(Boolean... allocateChildConnection) {
+        protected Boolean doInBackground(Void... params) {
             try {
                 LibraryLoader libraryLoader = LibraryLoader.get(LibraryProcessType.PROCESS_BROWSER);
                 libraryLoader.ensureInitialized();
@@ -56,9 +56,6 @@ public abstract class AsyncInitTaskRunner {
             } catch (ProcessInitException e) {
                 return false;
             }
-            if (allocateChildConnection[0]) {
-                ChildProcessLauncher.warmUp(ContextUtils.getApplicationContext());
-            }
             return true;
         }
 
@@ -99,8 +96,11 @@ public abstract class AsyncInitTaskRunner {
             mFetchSeedTask.executeOnExecutor(getExecutor());
         }
 
+        if (allocateChildConnection) {
+            ChildProcessLauncher.warmUp(ContextUtils.getApplicationContext());
+        }

[Maria, 2017/04/05 17:44:23]

Hmm, I hope that doing warm-up in parallel with the library load won't cause
both to slow down.

[boliu, 2017/04/05 17:52:58]

Land this and watch the perf bots I guess..

         mLoadTask = new LoadTask();
-        mLoadTask.executeOnExecutor(getExecutor(), allocateChildConnection);
+        mLoadTask.executeOnExecutor(getExecutor());
     }
 
     private void tasksPossiblyComplete(boolean result) {