Disable OOPBrowserTest.Basic on Linux

This test crashes with a check on Linux. On Linux CFI it crashes very
frequently.

FATAL:render_frame_metadata_provider_impl.cc(41)] Check failed:
render_frame_metadata_observer_ptr_.

TBR=khushalsagar@chromium.org

Bug: 880948
Change-Id: Ie2a536e1a72f9fb00f5f1515b1683b87e87d807e
Reviewed-on: https://chromium-review.googlesource.com/1215286Reviewed-by: Dominic Battré <battre@chromium.org>
Commit-Queue: Dominic Battré <battre@chromium.org>
Cr-Commit-Position: refs/heads/master@{#589870}

content/browser/oop_browsertest.cc

@@ -54,7 +54,13 @@ class OOPBrowserTest : public ContentBrowserTest {
 
 // This test calls into system GL which is not instrumented with MSAN.
 #if !defined(MEMORY_SANITIZER)
-IN_PROC_BROWSER_TEST_F(OOPBrowserTest, Basic) {
+// TODO(crbug.com/880948) Disabled for crashes on Linux CFI, see bug.
+#if defined(OS_LINUX)
+#define MAYBE_Basic DISABLED_Basic
+#else
+#define MAYBE_Basic Basic
+#endif
+IN_PROC_BROWSER_TEST_F(OOPBrowserTest, MAYBE_Basic) {
   // Create a div to ensure we don't use solid color quads.
   GURL url = GURL(
       "data:text/html,"