MDM Incognito Mode Restriction

Implements handling of MDM enforced restriction preventing the user
from opening an incognito tab.

When enforced by MDM, the Incognito button on the tabs screen
is greyed out, and if tapped, presents a toast message informing
the user that the setting is managed by the administrator.

This commit includes basic unit tests.

Change-Id: I26fcf10cc954f63c8e4489dbac9ff148e90b0c94

1 files changed, 10 insertions, 1 deletions

diff --git a/src/com/android/browser/NavScreen.java b/src/com/android/browser/NavScreen.java
index 9e32f49c..76d0703f 100644
--- a/src/com/android/browser/NavScreen.java
+++ b/src/com/android/browser/NavScreen.java
@@ -33,8 +33,10 @@ import android.widget.LinearLayout;
 import android.widget.PopupMenu;
 import android.widget.PopupMenu.OnMenuItemClickListener;
 import android.widget.RelativeLayout;
+import android.widget.Toast;
 
 import com.android.browser.NavTabScroller.OnRemoveListener;
+import com.android.browser.mdm.IncognitoRestriction;
 
 import java.util.HashMap;
 
@@ -107,12 +109,15 @@ public class NavScreen extends RelativeLayout
                 mUiController.getTabControl().getTabPosition(mUi.getActiveTab()));
     }
 
+
+
     private void init() {
         LayoutInflater.from(getContext()).inflate(R.layout.nav_screen, this);
         setContentDescription(getContext().getResources().getString(
                 R.string.accessibility_transition_navscreen));
         mToolbarLayout = findViewById(R.id.nav_toolbar_animate);
         mNewIncognitoTab = (ImageButton) findViewById(R.id.newincognitotab);
+        IncognitoRestriction.getInstance().registerButton(mNewIncognitoTab);
         mNewTab = (ImageButton) findViewById(R.id.newtab);
         mMore = (ImageButton) findViewById(R.id.more);
         mNewIncognitoTab.setOnClickListener(this);
@@ -144,7 +149,11 @@ public class NavScreen extends RelativeLayout
         if (mNewTab == v) {
             openNewTab();
         } else if (mNewIncognitoTab == v) {
-            openNewIncognitoTab();
+            if (IncognitoRestriction.getInstance().isEnabled()) {
+                Toast.makeText(getContext(), R.string.mdm_managed_alert, Toast.LENGTH_SHORT).show();
+            } else {
+                openNewIncognitoTab();
+            }
         } else if (mMore == v) {
             showPopupMenu();
         }