Update base::StartsWith calls to new form

chrome/common/extensions/manifest_tests/extension_manifests_homepage_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 "base/strings/string_util.h"
 #include "chrome/common/extensions/manifest_tests/chrome_manifest_test.h"
 #include "extensions/common/extension.h"
 #include "extensions/common/manifest_constants.h"
 #include "extensions/common/manifest_url_handlers.h"
 #include "testing/gtest/include/gtest/gtest.h"
@@ skipping 21 matching lines @@
 
 TEST_F(HomepageURLManifestTest, GetHomepageURL) {
   scoped_refptr<extensions::Extension> extension(
       LoadAndExpectSuccess("homepage_valid.json"));
   EXPECT_EQ(GURL("http://foo.com#bar"),
             extensions::ManifestURL::GetHomepageURL(extension.get()));
 
   // The Google Gallery URL ends with the id, which depends on the path, which
   // can be different in testing, so we just check the part before id.
   extension = LoadAndExpectSuccess("homepage_google_hosted.json");
-  EXPECT_TRUE(base::StartsWithASCII(
+  EXPECT_TRUE(base::StartsWith(
       extensions::ManifestURL::GetHomepageURL(extension.get()).spec(),
-      "https://chrome.google.com/webstore/detail/", false));
+      "https://chrome.google.com/webstore/detail/",
+      base::CompareCase::INSENSITIVE_ASCII));
 
   extension = LoadAndExpectSuccess("homepage_externally_hosted.json");
   EXPECT_EQ(GURL(), extensions::ManifestURL::GetHomepageURL(extension.get()));
 }