Fix AccountManagerHelper assert access from FRE.

chrome/android/java/src/org/chromium/chrome/browser/firstrun/FirstRunActivity.java

Index: chrome/android/java/src/org/chromium/chrome/browser/firstrun/FirstRunActivity.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/firstrun/FirstRunActivity.java b/chrome/android/java/src/org/chromium/chrome/browser/firstrun/FirstRunActivity.java
index dc79c4122ba1f3b992a9a5cbe9bc358f73583b9a..96908cc05d0578cabfc625c756bf745bb07d9e0d 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/firstrun/FirstRunActivity.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/firstrun/FirstRunActivity.java
@@ -24,6 +24,7 @@ import org.chromium.chrome.browser.customtabs.CustomTabActivity;
 import org.chromium.chrome.browser.customtabs.CustomTabsConnection;
 import org.chromium.chrome.browser.document.ChromeLauncherActivity;
 import org.chromium.chrome.browser.init.ChromeBrowserInitializer;
+import org.chromium.chrome.browser.init.EmptyBrowserParts;
 import org.chromium.chrome.browser.metrics.UmaUtils;
 import org.chromium.chrome.browser.net.spdyproxy.DataReductionProxySettings;
 import org.chromium.chrome.browser.preferences.datareduction.DataReductionPromoUtils;
@@ -173,6 +174,8 @@ public class FirstRunActivity extends AppCompatActivity implements FirstRunPageD
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
 
+        ChromeBrowserInitializer.getInstance(this).handlePreNativeStartup(new EmptyBrowserParts());
+
         if (savedInstanceState != null) {
             mFreProperties = savedInstanceState;
         } else if (getIntent() != null) {
@@ -513,7 +516,8 @@ public class FirstRunActivity extends AppCompatActivity implements FirstRunPageD
     private void ensureBrowserProcessInitialized() {
         if (mNativeSideIsInitialized) return;
         try {
-            ChromeBrowserInitializer.getInstance(this).handleSynchronousStartup();
+            ChromeBrowserInitializer.getInstance(this).handlePostNativeStartup(
+                    false, new EmptyBrowserParts());
             mNativeSideIsInitialized = true;
         } catch (ProcessInitException e) {
             Log.e(TAG, "Unable to load native library.", e);