Re-enable the RightClickMenuShowsCopyUrl test on mac.

Test timeout on CQ seems to have mysteriously fixed itself.

Bug:988323
Fixed:988323

Change-Id: Ia96d8a687bc161cf74f67fbf819ffaf7bb896755
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2325330
Auto-Submit: Glen Robertson <glenrob@chromium.org>
Commit-Queue: Evan Stade <estade@chromium.org>
Reviewed-by: Evan Stade <estade@chromium.org>
Cr-Commit-Position: refs/heads/master@{#792705}

chrome/browser/ui/views/location_bar/custom_tab_bar_view_browsertest.cc

@@ -422,14 +422,8 @@ IN_PROC_BROWSER_TEST_P(CustomTabBarViewBrowserTest,
 }
 
 // Right-click menu on CustomTabBar should have Copy URL option.
-// TODO(crbug.com/988323): Times out on Mac.
-#if defined(OS_MACOSX)
-#define MAYBE_RightClickMenuShowsCopyUrl DISABLED_RightClickMenuShowsCopyUrl
-#else
-#define MAYBE_RightClickMenuShowsCopyUrl RightClickMenuShowsCopyUrl
-#endif
 IN_PROC_BROWSER_TEST_P(CustomTabBarViewBrowserTest,
-                       MAYBE_RightClickMenuShowsCopyUrl) {
+                       RightClickMenuShowsCopyUrl) {
   const GURL& app_url = https_server()->GetURL("app.com", "/ssl/google.html");
   InstallPWA(app_url);
   EXPECT_TRUE(app_browser_->is_type_app());