Use GoogleAuthUtil's getToken instead of AccountManager

sync/android/java/src/org/chromium/sync/signin/AuthException.java

Index: sync/android/java/src/org/chromium/sync/signin/AuthException.java
diff --git a/sync/android/java/src/org/chromium/sync/signin/AuthException.java b/sync/android/java/src/org/chromium/sync/signin/AuthException.java
new file mode 100644
index 0000000000000000000000000000000000000000..dd3a48145149c77d95c0d30b57883dd9e81e49a1
--- /dev/null
+++ b/sync/android/java/src/org/chromium/sync/signin/AuthException.java
@@ -0,0 +1,44 @@
+// Copyright 2015 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.
+
+package org.chromium.sync.signin;
+
+import android.content.Intent;
+
+/*
+ * AuthException abstracts away authenticator specific exceptions behind a single interface.
+ * It is used for passing information that is useful for better handling of errors.
+ */
+public class AuthException extends Exception {
+    private final boolean mIsTransientError;
+    private final Intent mRecoveryIntent;
+
+    /*
+     * A simple constructor that stores all the error handling information and makes it available to
+     * the handler.
+     * @param isTransientError Whether the error is transient and we can retry.
+     * @param recoveryIntent An intent that can be used to recover from this error.
+     * Thus, a user recoverable error is not transient, since it requires explicit user handling
+     * before retry.

[Bernhard Bauer, 2015/11/19 15:23:33]

Can you check this invariant on construction?

[knn, 2015/11/19 16:09:25]

Done.

+     */
+    public AuthException(boolean isTransientError, Intent recoveryIntent) {
+        mIsTransientError = isTransientError;
+        mRecoveryIntent = recoveryIntent;
+    }
+
+    /*
+     * @return Whether the error is transient and we can retry.
+     */
+    public boolean isTransientError() {
+        return mIsTransientError;
+    }
+
+    /*
+     * @return An intent that can be used to recover from this error if it is recoverabale by user
+     * intervention, else {@code null}.
+     */
+    public Intent getRecoveryIntent() {
+        return mRecoveryIntent;
+    }
+}