Make Tab non-abstract by adding an empty implementation of createAutoLoginProcessor().

chrome/android/java/src/org/chromium/chrome/browser/Tab.java

Index: chrome/android/java/src/org/chromium/chrome/browser/Tab.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/Tab.java b/chrome/android/java/src/org/chromium/chrome/browser/Tab.java
index e58736e6f25418d37e4d4e020a51b462877f8b0d..0980916cd51fde273961ad169ac9fdbe0cdbe662 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/Tab.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/Tab.java
@@ -53,7 +53,7 @@ import java.util.concurrent.atomic.AtomicInteger;
  *    their own native pointer reference, but Tab#destroy() will handle deleting the native
  *    object.
  */
-public abstract class Tab implements NavigationClient {
+public class Tab implements NavigationClient {
     public static final int INVALID_TAB_ID = -1;
 
     /** Used for automatically generating tab ids. */
@@ -392,7 +392,14 @@ public abstract class Tab implements NavigationClient {
      * Create an {@code AutoLoginProcessor} to decide how to handle login
      * requests.
      */
-    protected abstract AutoLoginProcessor createAutoLoginProcessor();
+    protected AutoLoginProcessor createAutoLoginProcessor() {
+        return new AutoLoginProcessor() {
+            @Override
+            public void processAutoLoginResult(String accountName, String authToken,
+                    boolean success, String result) {
+            }
+        };
+    }
 
     /**
      * Prints the current page.