Disable TabCaptureApiTest.GrantForChromePages on macOS.

Flakes.

BUG=1134562
TBR=jophba@chromium.org

Change-Id: I012988badf77fb9c22f36569e447a029c3be5bc5
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2445869Reviewed-by: Greg Thompson <grt@chromium.org>
Commit-Queue: Greg Thompson <grt@chromium.org>
Cr-Commit-Position: refs/heads/master@{#813169}

chrome/browser/extensions/api/tab_capture/tab_capture_apitest.cc

@@ -322,7 +322,13 @@ IN_PROC_BROWSER_TEST_F(TabCaptureApiTest, FullscreenEvents) {
 }
 
 // Make sure tabCapture API can be granted for Chrome:// pages.
-IN_PROC_BROWSER_TEST_F(TabCaptureApiTest, GrantForChromePages) {
+// Disabled due to flakes on macOS; see https://crbug.com/1134562.
+#if defined(OS_MAC)
+#define MAYBE_GrantForChromePages DISABLED_GrantForChromePages
+#else
+#define MAYBE_GrantForChromePages GrantForChromePages
+#endif
+IN_PROC_BROWSER_TEST_F(TabCaptureApiTest, MAYBE_GrantForChromePages) {
   ExtensionTestMessageListener before_open_tab("ready1", true);
   ASSERT_TRUE(RunExtensionSubtest("tab_capture",
                                   "active_tab_chrome_pages.html"))