Remove the windows disable of UKM content tests.

This is reverting the disabling from here:
https://chromium-review.googlesource.com/c/chromium/src/+/1278543

Bug: 838549
Change-Id: Ia354b294aee539ba59d6d4aa160c38f9de7773b2
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1637051Reviewed-by: Bryan McQuade <bmcquade@chromium.org>
Commit-Queue: Robert Kaplow <rkaplow@chromium.org>
Cr-Commit-Position: refs/heads/master@{#702018}

components/ukm/content/source_url_recorder_browsertest.cc

@@ -6,7 +6,6 @@
 
 #include "base/files/scoped_temp_dir.h"
 #include "base/test/scoped_feature_list.h"
-#include "build/build_config.h"
 #include "components/ukm/content/source_url_recorder.h"
 #include "components/ukm/test_ukm_recorder.h"
 #include "content/public/browser/web_contents.h"
@@ -83,13 +82,7 @@ class SourceUrlRecorderWebContentsObserverDownloadBrowserTest
   base::ScopedTempDir downloads_directory_;
 };
 
-#if defined(OS_WIN)
-#define MAYBE_Basic DISABLED_Basic
-#else
-#define MAYBE_Basic Basic
-#endif
-IN_PROC_BROWSER_TEST_F(SourceUrlRecorderWebContentsObserverBrowserTest,
-                       MAYBE_Basic) {
+IN_PROC_BROWSER_TEST_F(SourceUrlRecorderWebContentsObserverBrowserTest, Basic) {
   using Entry = ukm::builders::DocumentCreated;
 
   GURL url = embedded_test_server()->GetURL("/title1.html");
@@ -114,13 +107,8 @@ IN_PROC_BROWSER_TEST_F(SourceUrlRecorderWebContentsObserverBrowserTest,
   EXPECT_NE(source->id(), ukm_entries[0]->source_id);
 }
 
-#if defined(OS_WIN)
-#define MAYBE_IgnoreUrlInSubframe DISABLED_IgnoreUrlInSubframe
-#else
-#define MAYBE_IgnoreUrlInSubframe IgnoreUrlInSubframe
-#endif
 IN_PROC_BROWSER_TEST_F(SourceUrlRecorderWebContentsObserverBrowserTest,
-                       MAYBE_IgnoreUrlInSubframe) {
+                       IgnoreUrlInSubframe) {
   using Entry = ukm::builders::DocumentCreated;
 
   GURL main_url = embedded_test_server()->GetURL("/page_with_iframe.html");