Enable download resumption by default.

chrome/browser/download/download_browsertest.cc

Index: chrome/browser/download/download_browsertest.cc
diff --git a/chrome/browser/download/download_browsertest.cc b/chrome/browser/download/download_browsertest.cc
index e5f6c5d888969ffbc25f2f7e5d9cb8310eedce8a..9e1ffb61e8b5d4abad42adfe2c3c42ffd95bd5c8 100644
--- a/chrome/browser/download/download_browsertest.cc
+++ b/chrome/browser/download/download_browsertest.cc
@@ -7,6 +7,7 @@
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/command_line.h"
+#include "base/feature_list.h"
 #include "base/files/file.h"
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
@@ -80,6 +81,7 @@
 #include "content/public/browser/render_widget_host.h"
 #include "content/public/browser/resource_context.h"
 #include "content/public/browser/web_contents.h"
+#include "content/public/common/content_features.h"
 #include "content/public/common/content_switches.h"
 #include "content/public/common/context_menu_params.h"
 #include "content/public/test/browser_test_utils.h"
@@ -407,6 +409,11 @@ class DownloadTest : public InProcessBrowserTest {
   DownloadTest() {}
 
   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));
     BrowserThread::PostTask(
         BrowserThread::IO, FROM_HERE,
         base::Bind(&chrome_browser_net::SetUrlRequestMocksEnabled, true));
@@ -844,11 +851,16 @@ class DownloadTest : public InProcessBrowserTest {
         browser()->tab_strip_model()->GetActiveWebContents();
     ASSERT_TRUE(web_contents);
 
-    scoped_ptr<content::DownloadTestObserver> observer(
-        new content::DownloadTestObserverTerminal(
-            download_manager,
-            1,
-            content::DownloadTestObserver::ON_DANGEROUS_DOWNLOAD_FAIL));
+    scoped_ptr<content::DownloadTestObserver> observer;
+    if (download_info.reason == content::DOWNLOAD_INTERRUPT_REASON_NONE) {
+      observer.reset(new content::DownloadTestObserverTerminal(
+          download_manager, 1,
+          content::DownloadTestObserver::ON_DANGEROUS_DOWNLOAD_FAIL));
+    } else {
+      observer.reset(new content::DownloadTestObserverInterrupted(
+          download_manager, 1,
+          content::DownloadTestObserver::ON_DANGEROUS_DOWNLOAD_FAIL));
+    }
 
     if (download_info.download_method == DOWNLOAD_DIRECT) {
       // Go directly to download.  Don't wait for navigation.
@@ -1691,9 +1703,11 @@ IN_PROC_BROWSER_TEST_F(DownloadTest, DownloadHistoryCheck) {
   // at this point as our queries will be behind the history updates
   // invoked by completion.
   scoped_ptr<content::DownloadTestObserver> download_observer(
-      CreateWaiter(browser(), 1));
-  ui_test_utils::NavigateToURL(browser(),
-      GURL(net::URLRequestSlowDownloadJob::kErrorDownloadUrl));
+      new content::DownloadTestObserverInterrupted(
+          DownloadManagerForBrowser(browser()), 1,
+          content::DownloadTestObserver::ON_DANGEROUS_DOWNLOAD_FAIL));
+  ui_test_utils::NavigateToURL(
+      browser(), GURL(net::URLRequestSlowDownloadJob::kErrorDownloadUrl));
   download_observer->WaitForFinished();
   EXPECT_EQ(1u, download_observer->NumDownloadsSeenInState(
       DownloadItem::INTERRUPTED));
@@ -3018,8 +3032,6 @@ IN_PROC_BROWSER_TEST_F(DownloadTest, MAYBE_DownloadTest_PercentComplete) {
 // A download that is interrupted due to a file error should be able to be
 // resumed.
 IN_PROC_BROWSER_TEST_F(DownloadTest, Resumption_NoPrompt) {
-  base::CommandLine::ForCurrentProcess()->AppendSwitch(
-      switches::kEnableDownloadResumption);
   scoped_refptr<content::TestFileErrorInjector> error_injector(
       content::TestFileErrorInjector::Create(
           DownloadManagerForBrowser(browser())));
@@ -3043,8 +3055,6 @@ IN_PROC_BROWSER_TEST_F(DownloadTest, Resumption_NoPrompt) {
 // path is invalid or unusable should cause a prompt to be displayed on
 // resumption.
 IN_PROC_BROWSER_TEST_F(DownloadTest, Resumption_WithPrompt) {
-  base::CommandLine::ForCurrentProcess()->AppendSwitch(
-      switches::kEnableDownloadResumption);
   scoped_refptr<content::TestFileErrorInjector> error_injector(
       content::TestFileErrorInjector::Create(
           DownloadManagerForBrowser(browser())));
@@ -3067,8 +3077,6 @@ IN_PROC_BROWSER_TEST_F(DownloadTest, Resumption_WithPrompt) {
 // The user shouldn't be prompted on a resumed download unless a prompt is
 // necessary due to the interrupt reason.
 IN_PROC_BROWSER_TEST_F(DownloadTest, Resumption_WithPromptAlways) {
-  base::CommandLine::ForCurrentProcess()->AppendSwitch(
-      switches::kEnableDownloadResumption);
   browser()->profile()->GetPrefs()->SetBoolean(
       prefs::kPromptForDownload, true);
   scoped_refptr<content::TestFileErrorInjector> error_injector(
@@ -3097,8 +3105,6 @@ IN_PROC_BROWSER_TEST_F(DownloadTest, Resumption_WithPromptAlways) {
 // A download that is interrupted due to a transient error should be resumed
 // automatically.
 IN_PROC_BROWSER_TEST_F(DownloadTest, Resumption_Automatic) {
-  base::CommandLine::ForCurrentProcess()->AppendSwitch(
-      switches::kEnableDownloadResumption);
   scoped_refptr<content::TestFileErrorInjector> error_injector(
       content::TestFileErrorInjector::Create(
           DownloadManagerForBrowser(browser())));
@@ -3117,8 +3123,6 @@ IN_PROC_BROWSER_TEST_F(DownloadTest, Resumption_Automatic) {
 
 // An interrupting download should be resumable multiple times.
 IN_PROC_BROWSER_TEST_F(DownloadTest, Resumption_MultipleAttempts) {
-  base::CommandLine::ForCurrentProcess()->AppendSwitch(
-      switches::kEnableDownloadResumption);
   scoped_refptr<content::TestFileErrorInjector> error_injector(
       content::TestFileErrorInjector::Create(
           DownloadManagerForBrowser(browser())));