Enable download resumption by default.

chrome/browser/extensions/api/downloads/downloads_api_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.
 
 // Disable everything on windows only. http://crbug.com/306144
 #ifndef OS_WIN
 
 #include <algorithm>
 
 #include "base/files/file_util.h"
@@ skipping 19 matching lines @@
 #include "chrome/common/pref_names.h"
 #include "chrome/test/base/in_process_browser_test.h"
 #include "chrome/test/base/ui_test_utils.h"
 #include "content/public/browser/browser_context.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/download_item.h"
 #include "content/public/browser/download_manager.h"
 #include "content/public/browser/notification_service.h"
 #include "content/public/browser/storage_partition.h"
 #include "content/public/browser/web_contents.h"
-#include "content/public/common/content_switches.h"
+#include "content/public/common/content_features.h"
 #include "content/public/test/download_test_observer.h"
 #include "extensions/browser/event_router.h"
 #include "extensions/browser/notification_types.h"
 #include "net/base/data_url.h"
 #include "net/base/net_util.h"
 #include "net/test/embedded_test_server/embedded_test_server.h"
 #include "net/test/url_request/url_request_slow_download_job.h"
 #include "net/url_request/url_request.h"
 #include "net/url_request/url_request_context.h"
 #include "net/url_request/url_request_job.h"
@@ skipping 251 matching lines @@
 
   void RemoveFilenameDeterminer(content::RenderProcessHost* host) {
     EventRouter::Get(current_browser()->profile())->RemoveEventListener(
         downloads::OnDeterminingFilename::kEventName, host, GetExtensionId());
   }
 
   Browser* current_browser() { return current_browser_; }
 
   // InProcessBrowserTest
   void SetUpOnMainThread() override {
+    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));
+
     ExtensionApiTest::SetUpOnMainThread();
     BrowserThread::PostTask(
         BrowserThread::IO, FROM_HERE,
         base::Bind(&chrome_browser_net::SetUrlRequestMocksEnabled, true));
     InProcessBrowserTest::SetUpOnMainThread();
     GoOnTheRecord();
     CreateAndSetDownloadsDirectory();
     current_browser()->profile()->GetPrefs()->SetBoolean(
         prefs::kPromptForDownload, false);
     GetOnRecordManager()->RemoveAllDownloads();
@@ skipping 3529 matching lines @@
 #else
 #define MAYBE_DownloadExtensionTest_OnDeterminingFilename_InterruptedResume \
     DownloadExtensionTest_OnDeterminingFilename_InterruptedResume
 #endif
 
 // Test download interruption while extensions determining filename. Should not
 // re-dispatch onDeterminingFilename.
 IN_PROC_BROWSER_TEST_F(
     DownloadExtensionTest,
     MAYBE_DownloadExtensionTest_OnDeterminingFilename_InterruptedResume) {
-  base::CommandLine::ForCurrentProcess()->AppendSwitch(
-      switches::kEnableDownloadResumption);
   LoadExtension("downloads_split");
   ASSERT_TRUE(StartEmbeddedTestServer());
   GoOnTheRecord();
   content::RenderProcessHost* host = AddFilenameDeterminer();
 
   // Start a download.
   DownloadItem* item = NULL;
   {
     DownloadManager* manager = GetCurrentManager();
     scoped_ptr<content::DownloadTestObserver> observer(
@@ skipping 278 matching lines @@
   EXPECT_EQ(downloads::FILENAME_CONFLICT_ACTION_PROMPT, conflict_action);
   EXPECT_FALSE(warnings.empty());
   EXPECT_EQ(Warning::kDownloadFilenameConflict,
             warnings.begin()->warning_type());
   EXPECT_EQ("incumbent", warnings.begin()->extension_id());
 }
 
 }  // namespace extensions
 
 #endif  // http://crbug.com/306144