[Downloads] Add context parameter to help center article URL.

chrome/browser/download/download_commands_unittest.cc

Index: chrome/browser/download/download_commands_unittest.cc
diff --git a/chrome/browser/download/download_commands_unittest.cc b/chrome/browser/download/download_commands_unittest.cc
index 46717c455f1ead71d29ef6224654d506514691db..e21770d73ccb10afec512d43110b243a83deade8 100644
--- a/chrome/browser/download/download_commands_unittest.cc
+++ b/chrome/browser/download/download_commands_unittest.cc
@@ -6,6 +6,7 @@
 
 #include <vector>
 
+#include "base/strings/stringprintf.h"
 #include "content/public/test/mock_download_item.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
@@ -154,3 +155,15 @@ TEST_F(DownloadCommandsTest, DoResume) {
   EXPECT_CALL(item(), Resume()).Times(1);
   commands().ExecuteCommand(DownloadCommands::RESUME);
 }
+
+TEST_F(DownloadCommandsTest,
+       GetLearnMoreURLForInterruptedDownload_ContainsContext) {
+  EXPECT_CALL(item(), GetLastReason())
+      .WillOnce(
+          Return(content::DOWNLOAD_INTERRUPT_REASON_NETWORK_DISCONNECTED));
+  GURL learn_more_url = commands().GetLearnMoreURLForInterruptedDownload();
+  std::string name_value_pair = base::StringPrintf(
+      "ctx=%d", content::DOWNLOAD_INTERRUPT_REASON_NETWORK_DISCONNECTED);
+  EXPECT_LT(0u, learn_more_url.query().find(name_value_pair))
+      << learn_more_url.spec();
+}