[sync] Sign user out of Chrome on dashboard stop and reset

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

Index: chrome/android/java/src/org/chromium/chrome/browser/signin/SigninManager.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/signin/SigninManager.java b/chrome/android/java/src/org/chromium/chrome/browser/signin/SigninManager.java
index 995a0e5e7850767ae1a8428deac2087b5caa54db..86ca04257cea3b02fae2f8c5346b046ea88b9aa0 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/signin/SigninManager.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/signin/SigninManager.java
@@ -77,6 +77,8 @@ public class SigninManager implements AccountTrackerService.OnSystemAccountsSeed
 
     private boolean mSigninAllowedByPolicy;
 
+    private boolean mSignOutInProgress;
+
     /**
      * A SignInStateObserver is notified when the user signs in to or out of Chrome.
      */
@@ -516,6 +518,7 @@ public class SigninManager implements AccountTrackerService.OnSystemAccountsSeed
      * @param wipeDataHooks Hooks to call during data wiping in case the account is managed.
      */
     public void signOut(Runnable callback, WipeDataHooks wipeDataHooks) {
+        mSignOutInProgress = true;
         mSignOutCallback = callback;
 
         boolean wipeData = getManagementDomain() != null;
@@ -587,7 +590,15 @@ public class SigninManager implements AccountTrackerService.OnSystemAccountsSeed
         onSignOutDone();
     }
 
+    @CalledByNative
+    private void onNativeSignOut() {
+        if (!mSignOutInProgress) {
+            signOut();
+        }
+    }
+
     private void onSignOutDone() {
+        mSignOutInProgress = false;
         if (mSignOutCallback != null) {
             new Handler().post(mSignOutCallback);
             mSignOutCallback = null;