Allow extensions on chrome:// URLs, when flag is set and permission is explicitly requested

chrome/common/extensions/manifest_tests/extension_manifests_contentscript_unittest.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.
 
-#include "chrome/common/extensions/manifest_tests/extension_manifest_test.h"
-
+#include "base/command_line.h"
 #include "base/strings/string_number_conversions.h"
+#include "chrome/common/chrome_switches.h"
 #include "chrome/common/extensions/extension.h"
 #include "chrome/common/extensions/extension_manifest_constants.h"
+#include "chrome/common/extensions/manifest_tests/extension_manifest_test.h"
 #include "extensions/common/error_utils.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace errors = extension_manifest_errors;
 
 TEST_F(ExtensionManifestTest, ContentScriptMatchPattern) {
   Testcase testcases[] = {
     // chrome:// urls are not allowed.
     Testcase("content_script_chrome_url_invalid.json",
              extensions::ErrorUtils::FormatErrorMessage(
                  errors::kInvalidMatch,
                  base::IntToString(0),
                  base::IntToString(0),
                  URLPattern::GetParseResultString(
                      URLPattern::PARSE_ERROR_INVALID_SCHEME))),
 
     // Match paterns must be strings.
     Testcase("content_script_match_pattern_not_string.json",
              extensions::ErrorUtils::FormatErrorMessage(errors::kInvalidMatch,
                                                         base::IntToString(0),
                                                         base::IntToString(0),
                                                         errors::kExpectString))
   };
   RunTestcases(testcases, arraysize(testcases),
                EXPECT_TYPE_ERROR);
 
   LoadAndExpectSuccess("ports_in_content_scripts.json");
 }
+
+TEST_F(ExtensionManifestTest, ContentScriptsOnChromeUrlsWithFlag) {
+  CommandLine::ForCurrentProcess()->AppendSwitch(
+      switches::kExtensionsOnChromeURLs);
+  std::string error;
+  scoped_refptr<extensions::Extension> extension =
+    LoadAndExpectSuccess("content_script_chrome_url_invalid.json");
+  EXPECT_EQ("", error);
+  const GURL newtab_url("chrome://newtab/");
+  EXPECT_TRUE(extension->HasContentScriptAtURL(newtab_url));
+}