ChromeSecurityExploitBrowserTest: normalize whitespace for tests

chrome/browser/chrome_security_exploit_browsertest.cc

 // Copyright (c) 2013 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.
 
 #include "base/command_line.h"
 #include "base/macros.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/test/histogram_tester.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_commands.h"
@@ skipping 160 matching lines @@
   // attacker-controlled value in a resource on the extension origin.
   content::PwnMessageHelper::FileSystemWrite(rfh->GetProcess(), 24, target_url,
                                              blob_id, 0);
 
   // Now navigate to |target_url| in a new tab. It should not contain |payload|.
   AddTabAtIndex(0, target_url, ui::PAGE_TRANSITION_TYPED);
   content::WaitForLoadStop(browser()->tab_strip_model()->GetWebContentsAt(0));
   rfh = browser()->tab_strip_model()->GetActiveWebContents()->GetMainFrame();
   EXPECT_EQ(GURL(target_origin), rfh->GetSiteInstance()->GetSiteURL());
   std::string body;
-  EXPECT_TRUE(content::ExecuteScriptAndExtractString(
-      rfh, "window.domAutomationController.send(document.body.innerText);",
-      &body));
+  std::string script = R"(
+    var textContent = document.body.innerText.replace(/\n+/g, '\n');
+    window.domAutomationController.send(textContent);
+  )";
+
+  EXPECT_TRUE(content::ExecuteScriptAndExtractString(rfh, script, &body));
   if (extensions::IsIsolateExtensionsEnabled()) {
     EXPECT_EQ(
-        "\nYour file was not found\n\n"
+        "\nYour file was not found\n"
         "It may have been moved or deleted.\n"
         "ERR_FILE_NOT_FOUND\n",
         body);
   } else {
     // Without --isolate-extensions, the above steps must succeed, since
     // unblessed extension frames are allowed in ordinary renderer processes.
     EXPECT_EQ("pwned.", body);
   }
 }