[Autofill] Add support for signin promo on Android

chrome/android/java/src/org/chromium/chrome/browser/signin/SigninAndSyncView.java

Index: chrome/android/java/src/org/chromium/chrome/browser/signin/SigninAndSyncView.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/signin/SigninAndSyncView.java b/chrome/android/java/src/org/chromium/chrome/browser/signin/SigninAndSyncView.java
index 2af88cc66b1cc9c17f2223dc585dd5a4e3dcff7b..efcf0d28d1e48a621aa12e8c1afbf8ffa35a49dd 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/signin/SigninAndSyncView.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/signin/SigninAndSyncView.java
@@ -191,8 +191,8 @@ public class SigninAndSyncView extends LinearLayout
                 new OnClickListener() {
                     @Override
                     public void onClick(View view) {
-                        AccountSigninActivity
-                                .startAccountSigninActivity(getContext(), mAccessPoint);
+                        AccountSigninActivity.startAccountSigninActivity(
+                                getContext(), mAccessPoint, /* useNewTaskFlag */ false);
                     }
                 });
 
@@ -292,4 +292,4 @@ public class SigninAndSyncView extends LinearLayout
     public void androidSyncSettingsChanged() {
         update();
     }
-}
+}