Delete dead code for CurrentlyOpenTabs

chrome/browser/android/ntp/new_tab_page_prefs.h

 // Copyright 2013 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.
 
 #ifndef CHROME_BROWSER_ANDROID_NTP_NEW_TAB_PAGE_PREFS_H_
 #define CHROME_BROWSER_ANDROID_NTP_NEW_TAB_PAGE_PREFS_H_
 
 #include <jni.h>
 
 #include "base/android/scoped_java_ref.h"
 #include "base/macros.h"
 #include "chrome/browser/profiles/profile.h"
 
 class NewTabPagePrefs {
  public:
   explicit NewTabPagePrefs(Profile* profile);
   void Destroy(JNIEnv* env, const base::android::JavaParamRef<jobject>& obj);
 
-  jboolean GetCurrentlyOpenTabsCollapsed(
-      JNIEnv* env,
-      const base::android::JavaParamRef<jobject>& obj);
-  void SetCurrentlyOpenTabsCollapsed(
-      JNIEnv* env,
-      const base::android::JavaParamRef<jobject>& obj,
-      jboolean is_collapsed);
-
   jboolean GetSnapshotDocumentCollapsed(
       JNIEnv* env,
       const base::android::JavaParamRef<jobject>& obj);
   void SetSnapshotDocumentCollapsed(
       JNIEnv* env,
       const base::android::JavaParamRef<jobject>& obj,
       jboolean is_collapsed);
 
   jboolean GetRecentlyClosedTabsCollapsed(
       JNIEnv* env,
@@ skipping 23 matching lines @@
   static bool RegisterNewTabPagePrefs(JNIEnv* env);
   static void RegisterProfilePrefs(user_prefs::PrefRegistrySyncable* registry);
  private:
   virtual ~NewTabPagePrefs();
 
   Profile* profile_;  // weak
   DISALLOW_COPY_AND_ASSIGN(NewTabPagePrefs);
 };
 
 #endif  // CHROME_BROWSER_ANDROID_NTP_NEW_TAB_PAGE_PREFS_H_