Signin: Reuse existing "update gms" dialogs when possible.

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

Index: chrome/android/java/src/org/chromium/chrome/browser/signin/AccountSigninView.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/signin/AccountSigninView.java b/chrome/android/java/src/org/chromium/chrome/browser/signin/AccountSigninView.java
index ddcaa3534b6fb6f2539669f1799dfbb506335810..79cf726ee5cb0407104d1f762aa39bbf1bfba760 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/signin/AccountSigninView.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/signin/AccountSigninView.java
@@ -336,8 +336,10 @@ public class AccountSigninView extends FrameLayout implements ProfileDownloader.
 
     private boolean checkGooglePlayServicesAvailable() {
         ExternalAuthUtils extAuthUtils = ExternalAuthUtils.getInstance();
-        mGooglePlayServicesUpdateErrorHandler = new UserRecoverableErrorHandler.ModalDialog(
-                mDelegate.getActivity());
+        if (mGooglePlayServicesUpdateErrorHandler == null) {
+            mGooglePlayServicesUpdateErrorHandler = new UserRecoverableErrorHandler.ModalDialog(
+                    mDelegate.getActivity());
+        }
         int resultCode = extAuthUtils.canUseGooglePlayServicesResultCode(
                 getContext(), mGooglePlayServicesUpdateErrorHandler);
         if (extAuthUtils.isGooglePlayServicesUpdateRequiredError(resultCode)) {