Added SigninManager.isSignInDisabledByPolicy.

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 dbe2b4ee0589eb24838a3bccbe3d815852cca284..583eeb38b6dd5bd94e1b023a1db4ea174c9cf5e7 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
@@ -141,6 +141,13 @@ public class SigninManager {
                 ChromeSigninController.get(mContext).getSignedInUser() == null;
     }
 
+    /**
+     * Returns true if signin is disabled by policy.
+     */
+    public boolean isSigninDisabledByPolicy() {
+        return !mSigninAllowedByPolicy;
+    }
+
     public void addSignInAllowedObserver(SignInAllowedObserver observer) {
         mSignInAllowedObservers.addObserver(observer);
     }