Convert enable_plugins to a buildflag header.

content/shell/browser/layout_test/layout_test_browser_main_parts.cc

 // 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.
 
 #include "content/shell/browser/layout_test/layout_test_browser_main_parts.h"
 
 #include "base/base_switches.h"
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/files/file_path.h"
 #include "base/message_loop/message_loop.h"
 #include "base/threading/thread.h"
 #include "base/threading/thread_restrictions.h"
 #include "build/build_config.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/storage_partition.h"
 #include "content/public/common/content_switches.h"
 #include "content/public/common/main_function_params.h"
 #include "content/public/common/url_constants.h"
 #include "content/shell/browser/layout_test/layout_test_browser_context.h"
 #include "content/shell/browser/shell.h"
 #include "content/shell/browser/shell_browser_context.h"
 #include "content/shell/browser/shell_devtools_manager_delegate.h"
 #include "content/shell/browser/shell_net_log.h"
 #include "content/shell/common/shell_switches.h"
 #include "net/base/filename_util.h"
 #include "net/base/net_module.h"
 #include "net/grit/net_resources.h"
+#include "ppapi/features/features.h"
 #include "storage/browser/quota/quota_manager.h"
 #include "ui/base/resource/resource_bundle.h"
 #include "url/gurl.h"
 
-#if defined(ENABLE_PLUGINS)
+#if BUILDFLAG(ENABLE_PLUGINS)
 #include "content/public/browser/plugin_service.h"
 #include "content/shell/browser/shell_plugin_service_filter.h"
 #endif
 
 #if defined(OS_ANDROID)
 #include "components/crash/content/browser/crash_dump_manager_android.h"
 #include "net/android/network_change_notifier_factory_android.h"
 #include "net/base/network_change_notifier.h"
 #endif
 
@@ skipping 32 matching lines @@
           ->GetQuotaManager();
   BrowserThread::PostTask(
       BrowserThread::IO,
       FROM_HERE,
       base::Bind(&storage::QuotaManager::SetTemporaryGlobalOverrideQuota,
                  quota_manager,
                  kDefaultLayoutTestQuotaBytes *
                      storage::QuotaManager::kPerHostTemporaryPortion,
                  storage::QuotaCallback()));
 
-#if defined(ENABLE_PLUGINS)
+#if BUILDFLAG(ENABLE_PLUGINS)
   PluginService* plugin_service = PluginService::GetInstance();
   plugin_service_filter_.reset(new ShellPluginServiceFilter);
   plugin_service->SetFilter(plugin_service_filter_.get());
 #endif
 }
 
 }  // namespace