Enable download resumption by default.

content/browser/download/download_browsertest.cc

 // Copyright (c) 2012 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.
 
 // This file contains download browser tests that are known to be runnable
 // in a pure content context.  Over time tests should be migrated here.
 
 #include <vector>
 
 #include "base/callback_helpers.h"
-#include "base/command_line.h"
+#include "base/feature_list.h"
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/format_macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/strings/stringprintf.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/threading/platform_thread.h"
 #include "base/time/time.h"
 #include "content/browser/byte_stream.h"
 #include "content/browser/download/download_file_factory.h"
 #include "content/browser/download/download_file_impl.h"
 #include "content/browser/download/download_item_impl.h"
 #include "content/browser/download/download_manager_impl.h"
 #include "content/browser/download/download_resource_handler.h"
 #include "content/browser/web_contents/web_contents_impl.h"
 #include "content/public/browser/power_save_blocker.h"
-#include "content/public/common/content_switches.h"
+#include "content/public/common/content_features.h"
 #include "content/public/common/webplugininfo.h"
 #include "content/public/test/browser_test_utils.h"
 #include "content/public/test/content_browser_test.h"
 #include "content/public/test/content_browser_test_utils.h"
 #include "content/public/test/download_test_observer.h"
 #include "content/public/test/test_download_request_handler.h"
 #include "content/public/test/test_file_error_injector.h"
 #include "content/public/test/test_utils.h"
 #include "content/shell/browser/shell.h"
 #include "content/shell/browser/shell_browser_context.h"
@@ skipping 662 matching lines @@
 // run once with RESUME_WITH_RENDERER and once with RESUME_WITHOUT_RENDERER.
 // Use initiator_shell_for_resumption() to retrieve the Shell object that should
 // be used as the originator for the initial download. Prior to calling
 // Resume(), call PrepareToResume() which will cause the originating Shell to be
 // deleted if the test parameter is RESUME_WITHOUT_RENDERER.
 class DownloadResumptionContentTest
     : public DownloadContentTest,
       public ::testing::WithParamInterface<DownloadResumptionTestType> {
  public:
   void SetUpOnMainThread() override {
-    base::CommandLine::ForCurrentProcess()->AppendSwitch(
-        switches::kEnableDownloadResumption);
+    base::FeatureList::ClearInstanceForTesting();
+    scoped_ptr<base::FeatureList> feature_list(new base::FeatureList);
+    feature_list->InitializeFromCommandLine(
+        features::kDownloadResumption.name, std::string());
+    base::FeatureList::SetInstance(std::move(feature_list));
+
     DownloadContentTest::SetUpOnMainThread();
 
     if (GetParam() == DownloadResumptionTestType::RESUME_WITHOUT_RENDERER)
       initiator_shell_for_resumption_ = CreateBrowser();
     else
       initiator_shell_for_resumption_ = shell();
 
     ASSERT_EQ(DownloadManagerForShell(shell()),
               DownloadManagerForShell(initiator_shell_for_resumption()));
   }
@@ skipping 988 matching lines @@
 
   std::vector<DownloadItem*> downloads;
   DownloadManagerForShell(shell())->GetAllDownloads(&downloads);
   ASSERT_EQ(1u, downloads.size());
 
   EXPECT_EQ(FILE_PATH_LITERAL("Jumboshrimp.txt"),
             downloads[0]->GetTargetFilePath().BaseName().value());
 }
 
 }  // namespace content