[Home] Ensure incognito tab model is created when NTP opened

chrome/android/java/src/org/chromium/chrome/browser/tabmodel/document/DocumentTabModelImpl.java

Index: chrome/android/java/src/org/chromium/chrome/browser/tabmodel/document/DocumentTabModelImpl.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/tabmodel/document/DocumentTabModelImpl.java b/chrome/android/java/src/org/chromium/chrome/browser/tabmodel/document/DocumentTabModelImpl.java
index 4b87103eb39c747e3de7a8089721902f3d19dc19..9df4985c2b8bade445d9aed8532c902c60e5f6f1 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/tabmodel/document/DocumentTabModelImpl.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/tabmodel/document/DocumentTabModelImpl.java
@@ -314,16 +314,13 @@ public class DocumentTabModelImpl extends TabModelJniBridge implements DocumentT
     }
 
     @Override
-    public void commitAllTabClosures() {
-    }
+    public void commitAllTabClosures() {}
 
     @Override
-    public void commitTabClosure(int tabId) {
-    }
+    public void commitTabClosure(int tabId) {}
 
     @Override
-    public void cancelTabClosure(int tabId) {
-    }
+    public void cancelTabClosure(int tabId) {}
 
     @Override
     public TabList getComprehensiveModel() {
@@ -331,14 +328,14 @@ public class DocumentTabModelImpl extends TabModelJniBridge implements DocumentT
     }
 
     @Override
-    public void addObserver(TabModelObserver observer) {
-    }
+    public void addObserver(TabModelObserver observer) {}
 
     @Override
-    public void removeObserver(TabModelObserver observer) {
-    }
+    public void removeObserver(TabModelObserver observer) {}
 
     @Override
-    public void openMostRecentlyClosedTab() {
-    }
+    public void openMostRecentlyClosedTab() {}
+
+    @Override
+    public void setMayAddTab(boolean mayAddTab) {}
 }