[Bookmarks] Refactor search view to use SelectableListLayout paradigm

chrome/android/java/src/org/chromium/chrome/browser/bookmarks/BookmarkPromoHeader.java

 // Copyright 2015 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.
 
 package org.chromium.chrome.browser.bookmarks;
 
 import android.content.Context;
 import android.content.SharedPreferences;
 import android.support.v7.widget.RecyclerView;
 import android.support.v7.widget.RecyclerView.ViewHolder;
 import android.view.ViewGroup;
 
 import org.chromium.base.ContextUtils;
+import org.chromium.base.VisibleForTesting;
 import org.chromium.base.metrics.RecordUserAction;
 import org.chromium.chrome.browser.signin.SigninAccessPoint;
 import org.chromium.chrome.browser.signin.SigninAndSyncView;
 import org.chromium.chrome.browser.signin.SigninManager;
 import org.chromium.chrome.browser.signin.SigninManager.SignInStateObserver;
 import org.chromium.components.sync.AndroidSyncSettings;
 import org.chromium.components.sync.AndroidSyncSettings.AndroidSyncSettingsObserver;
 
 /**
  * Class that manages all the logic and UI behind the signin promo header in the bookmark
@@ skipping 12 matching lines @@
         void onPromoHeaderShowingChanged(boolean isShowing);
     }
 
     private static final String PREF_SIGNIN_PROMO_DECLINED =
             "enhanced_bookmark_signin_promo_declined";
     private static final String PREF_SIGNIN_PROMO_SHOW_COUNT =
             "enhanced_bookmark_signin_promo_show_count";
     // TODO(kkimlabs): Figure out the optimal number based on UMA data.
     private static final int MAX_SIGNIN_PROMO_SHOW_COUNT = 5;
 
+    private static boolean sShouldShowForTests;
+
     private Context mContext;
     private SigninManager mSignInManager;
     private boolean mShouldShow;
     private PromoHeaderShowingChangeListener mShowingChangeListener;
 
     /**
      * Initializes the class. Note that this will start listening to signin related events and
      * update itself if needed.
      */
     BookmarkPromoHeader(Context context,
@@ skipping 23 matching lines @@
         AndroidSyncSettings.unregisterObserver(mContext, this);
 
         mSignInManager.removeSignInStateObserver(this);
         mSignInManager = null;
     }
 
     /**
      * @return Whether it should be showing.
      */
     boolean shouldShow() {
-        return mShouldShow;
+        return mShouldShow || sShouldShowForTests;
     }
 
     /**
      * @return Signin promo header {@link ViewHolder} instance that can be used with
      *         {@link RecyclerView}.
      */
     ViewHolder createHolder(ViewGroup parent) {
         SigninAndSyncView.Listener listener = new SigninAndSyncView.Listener() {
             @Override
             public void onViewDismissed() {
@@ skipping 47 matching lines @@
 
     @Override
     public void onSignedIn() {
         updateShouldShow(true);
     }
 
     @Override
     public void onSignedOut() {
         updateShouldShow(true);
     }
+
+    /**
+     * Forces the promo to show for testing purposes.
+     */
+    @VisibleForTesting
+    public static void setShouldShowForTests() {
+        sShouldShowForTests = true;
+    }
 }