Add a ProgressDialog during sign-in flow when GMS is updated.

chrome/android/java/res/layout/updating_gms_progress_view.xml

Index: chrome/android/java/res/layout/updating_gms_progress_view.xml
diff --git a/chrome/android/java/res/layout/updating_gms_progress_view.xml b/chrome/android/java/res/layout/updating_gms_progress_view.xml
new file mode 100644
index 0000000000000000000000000000000000000000..9482385485070a23ca8d6e57253852b2306ebde2
--- /dev/null
+++ b/chrome/android/java/res/layout/updating_gms_progress_view.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright 2016 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. -->
+
+<org.chromium.chrome.browser.widget.BoundedLinearLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:chrome="http://schemas.android.com/apk/res-auto"
+    android:gravity="center"
+    android:padding="24dp"
+    chrome:maxWidth="312dp"
+    style="@style/AlertDialogContent" >
+
+    <ProgressBar
+        android:id="@+id/progress"
+        android:layout_width="32dp"
+        android:layout_height="32dp"
+        android:layout_gravity="center_vertical" />
+
+    <TextView
+        android:id="@+id/message"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_gravity="center_vertical"
+        android:layout_marginStart="24dp"
+        android:text="@string/signin_gms_updating"
+        android:lineSpacingMultiplier="1.4"
+        android:textSize="14sp" />
+</org.chromium.chrome.browser.widget.BoundedLinearLayout>