CSSPreloadScanner should handle <base> adjusted URLs

third_party/WebKit/LayoutTests/fast/preloader/style-base.html

Index: third_party/WebKit/LayoutTests/fast/preloader/style-base.html
diff --git a/third_party/WebKit/LayoutTests/fast/preloader/style.html b/third_party/WebKit/LayoutTests/fast/preloader/style-base.html
similarity index 50%
copy from third_party/WebKit/LayoutTests/fast/preloader/style.html
copy to third_party/WebKit/LayoutTests/fast/preloader/style-base.html
index 1da7f392a6d670acb3ab037797b8e8589ec76e92..8819581e0732f2c23abc64fba343ae228d4808ac 100644
--- a/third_party/WebKit/LayoutTests/fast/preloader/style.html
+++ b/third_party/WebKit/LayoutTests/fast/preloader/style-base.html
@@ -5,26 +5,17 @@ if (window.testRunner)
 
 window.addEventListener('DOMContentLoaded', function() {
     if (window.internals) {
-        var success = internals.isPreloaded("resources/style1.css") && !internals.isPreloaded("resources/fail.css");
+        var success = internals.isPreloaded("resources/style1.css");
         console.log(success ? "PASS" : "FAIL");
     }
 }, false);
 </script>
-This test requires DumpRenderTree to see the log of what resources are loaded.
-<script src=resources/non-existant.js></script>
+This test requires content_shell --run-layout-test to see the log of what resources are loaded.
+<script src=non-existant.js></script>
 <script>document.write("<plaintext>");</script>
+<base href="resources/foo.html">
 <style>
 @charset "ascii";
 /* */
-@import "resources/style1.css";
-em {
-    @import "resources/fail.css";
-}
-@import "resources/fail.css";
-</style>
-<style>
-@media print {
-    @import "resources/fail.css";
-}
-@import "resources/fail.css";
+@import "style1.css";
 </style>