Disable (temporarily) WebView Browsertests on Mac build bots.

chrome/browser/apps/guest_view/web_view_browsertest.cc

Index: chrome/browser/apps/guest_view/web_view_browsertest.cc
diff --git a/chrome/browser/apps/guest_view/web_view_browsertest.cc b/chrome/browser/apps/guest_view/web_view_browsertest.cc
index bfadcac4a770d8ac008f3a137a4d2aedb8914a5e..bdd47777d5e4fe7225e4b9e66cb75954e92647a3 100644
--- a/chrome/browser/apps/guest_view/web_view_browsertest.cc
+++ b/chrome/browser/apps/guest_view/web_view_browsertest.cc
@@ -98,6 +98,10 @@
 #include "chrome/browser/chromeos/accessibility/speech_monitor.h"
 #endif
 
+// Turn these tests off on Mac while we collect data on windows server crashes
+// on mac chromium builders. https://crbug.com/653353
+#if !defined(OS_MACOSX)
+
 using extensions::ContextMenuMatcher;
 using extensions::ExtensionsAPIClient;
 using extensions::MenuItem;
@@ -3847,3 +3851,5 @@ IN_PROC_BROWSER_TEST_P(WebViewFocusTest, TouchFocusesEmbedder) {
   EXPECT_TRUE(aura_webview->HasFocus());
 }
 #endif
+
+#endif  // !defined(OS_MACOSX)