ChromeSecurityExploitBrowserTest: normalize whitespace for tests

chrome/browser/chrome_security_exploit_browsertest.cc

Index: chrome/browser/chrome_security_exploit_browsertest.cc
diff --git a/chrome/browser/chrome_security_exploit_browsertest.cc b/chrome/browser/chrome_security_exploit_browsertest.cc
index 35bb23f3a83daf1bef353c13146a5500cfcb72be..89d83fe3c4936c915b7eb1ba2f79d551998b3d6f 100644
--- a/chrome/browser/chrome_security_exploit_browsertest.cc
+++ b/chrome/browser/chrome_security_exploit_browsertest.cc
@@ -178,12 +178,15 @@ IN_PROC_BROWSER_TEST_F(ChromeSecurityExploitBrowserTest,
   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);