Ignore UTF-8's BOM when parsing userscript's metadata.

chrome/browser/extensions/user_script_master_unittest.cc

 // Copyright (c) 2008 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/browser/extensions/user_script_master.h"
 
 #include <string>
 
 #include "base/file_path.h"
 #include "base/file_util.h"
@@ skipping 200 matching lines @@
     "// ==UserScript==\n"
     "// @include http://*.mail.google.com/*\n"
     "// @match  \t http://mail.yahoo.com/*\n"
     "// ==/UserScript==\n");
 
   // Allowed to match @include and @match.
   UserScript script;
   EXPECT_TRUE(UserScriptMaster::ScriptReloader::ParseMetadataHeader(
       text, &script));
 }
+
+TEST_F(UserScriptMasterTest, Parse7) {
+  const std::string text(
+    "\xEF\xBB\xBF// ==UserScript==\n"
+    "// @match http://*.mail.google.com/*\n"
+    "// ==/UserScript==\n");
+
+  // Should Ignore UTF-8's BOM.
+  UserScript script;
+  EXPECT_TRUE(UserScriptMaster::ScriptReloader::ParseMetadataHeader(
+      text, &script));
+  ASSERT_EQ(1U, script.url_patterns().size());
+  EXPECT_EQ("http://*.mail.google.com/*",
+            script.url_patterns()[0].GetAsString());
+}