[Downloads] Add a browser test for <a download> with cross origin iframe.

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 <stddef.h>
 #include <stdint.h>
 #include <utility>
@@ skipping 557 matching lines @@
         BrowserThread::IO, FROM_HERE,
         base::Bind(&net::URLRequestSlowDownloadJob::AddUrlHandler));
     base::FilePath mock_base(GetTestFilePath("download", ""));
     BrowserThread::PostTask(
         BrowserThread::IO, FROM_HERE,
         base::Bind(
             &net::URLRequestMockHTTPJob::AddUrlHandlers, mock_base,
             make_scoped_refptr(content::BrowserThread::GetBlockingPool())));
   }
 
+  void SetUpCommandLine(base::CommandLine* commnad_line) override {
+    IsolateAllSitesForTesting(commnad_line);
+  }
+
   TestShellDownloadManagerDelegate* GetDownloadManagerDelegate() {
     return test_delegate_.get();
   }
 
   const base::FilePath& GetDownloadDirectory() const {
     return downloads_directory_.path();
   }
 
   // Create a DownloadTestObserverTerminal that will wait for the
   // specified number of downloads to finish.
@@ skipping 1884 matching lines @@
       DownloadItem::COMPLETE);
 
   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());
 }
 
+IN_PROC_BROWSER_TEST_F(DownloadContentTest, DownloadAttributeSameOriginIFrame) {
+  ASSERT_TRUE(embedded_test_server()->Start());
+
+  GURL frame_url = embedded_test_server()->GetURL(
+      "/download/download-attribute.html?target=/download/download-test.lib");
+  GURL document_url = embedded_test_server()->GetURL(
+      "/download/iframe-host.html?target=" + frame_url.spec());
+  DownloadItem* download = StartDownloadAndReturnItem(shell(), document_url);
+  WaitForCompletion(download);
+
+  EXPECT_STREQ(FILE_PATH_LITERAL("suggested-filename"),
+               download->GetTargetFilePath().BaseName().value().c_str());
+}
+
+IN_PROC_BROWSER_TEST_F(DownloadContentTest,
+                       DownloadAttributeCrossOriginIFrame) {
+  net::EmbeddedTestServer origin_one;
+  net::EmbeddedTestServer origin_two;
+  ASSERT_TRUE(origin_one.Start());
+  ASSERT_TRUE(origin_two.Start());
+
+  origin_one.ServeFilesFromDirectory(GetTestFilePath("download", ""));
+  origin_two.ServeFilesFromDirectory(GetTestFilePath("download", ""));
+
+  GURL frame_url =
+      origin_one.GetURL("/download-attribute.html?target=" +
+                        origin_two.GetURL("/download-test.lib").spec());
+  GURL::Replacements replacements;
+  replacements.SetHostStr("localhost");
+  frame_url = frame_url.ReplaceComponents(replacements);
+  GURL document_url =
+      origin_two.GetURL("/iframe-host.html?target=" + frame_url.spec());
+  DownloadItem* download = StartDownloadAndReturnItem(shell(), document_url);
+  WaitForCompletion(download);
+
+  EXPECT_STREQ(FILE_PATH_LITERAL("download-test.lib"),
+               download->GetTargetFilePath().BaseName().value().c_str());
+}
+
 }  // namespace content