Implement SearchTabHelperDelegate.

chrome/browser/ui/search/search_tab_helper_delegate.cc

+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "chrome/browser/ui/search/search_tab_helper_delegate.h"
+
+void SearchTabHelperDelegate::NavigateToURL(
+    const GURL& url,
+    WindowOpenDisposition disposition,
+    content::WebContents* source_contents) {
+}
+
+void SearchTabHelperDelegate::OnWebContentsInstantSupportDisabled(
+    const content::WebContents* web_contents) {
+}
+
+void SearchTabHelperDelegate::RemoveMostVisitedItemsMatchingOpenTabs(
+    std::vector<InstantMostVisitedItem>* items) {
+}
+
+OmniboxView* SearchTabHelperDelegate::GetOmniboxView() {
+  return NULL;
+}
+
+SearchTabHelperDelegate::~SearchTabHelperDelegate() {
+}