[Enhanced Bookmarks] Make enhanced bookmarks default for Android.

components/enhanced_bookmarks/enhanced_bookmark_features.cc

 // 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.
 
 #include "components/enhanced_bookmarks/enhanced_bookmark_features.h"
 
 #include <string>
 
 #include "base/command_line.h"
 #include "components/enhanced_bookmarks/enhanced_bookmark_switches.h"
-#include "components/offline_pages/offline_page_feature.h"
 #include "components/variations/variations_associated_data.h"
 
-#if defined(OS_IOS) || defined(OS_ANDROID)
-
 namespace enhanced_bookmarks {
 namespace {
 const char kFieldTrialName[] = "EnhancedBookmarks";
 }  // namespace
 
 bool IsEnhancedBookmarksEnabled() {
-#if defined(OS_ANDROID)
-  // If offline pages feature is enabled, also enable enhanced bookmarks feature
-  // regardless its state.
-  if (offline_pages::IsOfflinePagesEnabled())
-    return true;
-#endif
-
   // kEnhancedBookmarksExperiment flag could have values "", "1" and "0".  "" -
   // default, "0" - user opted out, "1" - user opted in.  Tests also use the
   // command line flag to force enhanced bookmark to be on.
   std::string switch_value =
       base::CommandLine::ForCurrentProcess()->GetSwitchValueASCII(
           switches::kEnhancedBookmarksExperiment);
   if (switch_value == "1")
     return true;
   if (switch_value == "0")
     return false;
 
   // Check that the "id" param is present. This is a legacy of the desktop
   // implementation providing the extension id via param. This probably should
   // be replaced with code that checks the experiment name instead.
   return !variations::GetVariationParamValue(kFieldTrialName, "id").empty();
 }
 
 }  // namespace enhanced_bookmarks
-
-#endif