[Document mode] Force more pathways to use the TabDelegate instead

chrome/test/android/javatests/src/org/chromium/chrome/test/util/browser/tabmodel/document/MockTabDelegate.java

Index: chrome/test/android/javatests/src/org/chromium/chrome/test/util/browser/tabmodel/document/MockTabDelegate.java
diff --git a/chrome/test/android/javatests/src/org/chromium/chrome/test/util/browser/tabmodel/document/MockTabDelegate.java b/chrome/test/android/javatests/src/org/chromium/chrome/test/util/browser/tabmodel/document/MockTabDelegate.java
index c9a8b19668042926f758f9a944f4a3c6f8e3cfa4..23f5d480bc7f617cf25b6dacbdb2284972a17844 100644
--- a/chrome/test/android/javatests/src/org/chromium/chrome/test/util/browser/tabmodel/document/MockTabDelegate.java
+++ b/chrome/test/android/javatests/src/org/chromium/chrome/test/util/browser/tabmodel/document/MockTabDelegate.java
@@ -39,9 +39,8 @@ public class MockTabDelegate implements TabDelegate {
     }
 
     @Override
-    public Tab createTabWithWebContents(
+    public void createTabWithWebContents(
             WebContents webContents, int parentId, TabLaunchType type, int startedBy) {
-        return null;
     }
 
     @Override
@@ -53,4 +52,9 @@ public class MockTabDelegate implements TabDelegate {
     public Tab launchNTP() {
         return null;
     }
+
+    @Override
+    public void createNewDocumentTab(LoadUrlParams loadUrlParams, TabLaunchType type, Tab parent,
+            int documentLaunchMode, int documentStartedBy, Integer requestId) {
+    }
 }