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..34376e623589b9d5dd4260c14408d6516b99ee27
--- /dev/null
+++ b/sync/android/java/src/org/chromium/sync/signin/AuthException.java
@@ -0,0 +1,56 @@
+// 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;
+    private final Exception mInnerException;
+
+    /*
+     * 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.
+     */
+    public AuthException(boolean isTransientError, Intent recoveryIntent, Exception exception) {
+        assert !isTransientError || recoveryIntent == null;
+        assert exception != null;
+        mIsTransientError = isTransientError;
+        mRecoveryIntent = recoveryIntent;
+        mInnerException = exception;
+    }
+
+    /*
+     * @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;
+    }
+
+    /*
+     * @return The original exception that is encapsulated by this AuthException.
+     * Used for logging.
+     */
+    public Exception getInnerException() {
+        return mInnerException;
+    }
+}