Re-enable PDFExtensionJSTest.PageChange on Windows.

Suspecting that the test was flaking because of
https://crbug.com/1111525, which is now fixed.

Bug: 1111530
Change-Id: I5e68c2fc23155ad3eac608fa5d1b167720b665c3
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2339814
Commit-Queue: Lei Zhang <thestig@chromium.org>
Auto-Submit: dpapad <dpapad@chromium.org>
Reviewed-by: Lei Zhang <thestig@chromium.org>
Cr-Commit-Position: refs/heads/master@{#795180}

chrome/browser/pdf/pdf_extension_test.cc

@@ -877,12 +877,8 @@ IN_PROC_BROWSER_TEST_F(PDFExtensionJSTest, Title) {
 IN_PROC_BROWSER_TEST_F(PDFExtensionJSTest, WhitespaceTitle) {
   RunTestsInJsModule("whitespace_title_test.js", "test-whitespace-title.pdf");
 }
-#if defined(OS_WIN)
-#define MAYBE_PageChange DISABLED_PageChange
-#else
-#define MAYBE_PageChange PageChange
-#endif
-IN_PROC_BROWSER_TEST_F(PDFExtensionJSTest, MAYBE_PageChange) {
+
+IN_PROC_BROWSER_TEST_F(PDFExtensionJSTest, PageChange) {
   RunTestsInJsModule("page_change_test.js", "test-bookmarks.pdf");
 }