[MemSheriff] Suppress uninit read in clipboard msg for Dr. Memory + msan

content/browser/frame_host/interstitial_page_impl_browsertest.cc

Index: content/browser/frame_host/interstitial_page_impl_browsertest.cc
diff --git a/content/browser/frame_host/interstitial_page_impl_browsertest.cc b/content/browser/frame_host/interstitial_page_impl_browsertest.cc
index a1d69fdae3717173bef55721cd22cb77dedbb3d2..623e8c23904d00fb8240ddc1407e73d7e1c30c42 100644
--- a/content/browser/frame_host/interstitial_page_impl_browsertest.cc
+++ b/content/browser/frame_host/interstitial_page_impl_browsertest.cc
@@ -349,7 +349,14 @@ IN_PROC_BROWSER_TEST_F(InterstitialPageImplTest, Copy) {
   TearDownInterstitialPage();
 }
 
-IN_PROC_BROWSER_TEST_F(InterstitialPageImplTest, Paste) {
+// Failing on msan bot: crbug.com/506921
+#if defined(MEMORY_SANITIZER)
+#define MAYBE_Paste DISABLED_Paste
+#else
+#define MAYBE_Paste Paste
+#endif
+
+IN_PROC_BROWSER_TEST_F(InterstitialPageImplTest, MAYBE_Paste) {
   SetUpTestClipboard();
   SetUpInterstitialPage();