Mark a bunch of tests as failures.

content/browser/gpu/gpu_crash_browsertest.cc

Index: content/browser/gpu/gpu_crash_browsertest.cc
===================================================================
--- content/browser/gpu/gpu_crash_browsertest.cc	(revision 179917)
+++ content/browser/gpu/gpu_crash_browsertest.cc	(working copy)
@@ -26,6 +26,11 @@
 };
 
 IN_PROC_BROWSER_TEST_F(GpuCrashTest, MANUAL_Kill) {
+#if defined(OS_MACOSX)
+  // crbug.com/173456
+  return;
+#endif
+
   DOMMessageQueue message_queue;
 
   content::GpuDataManagerImpl::GetInstance()->
@@ -52,6 +57,11 @@
 }
 
 IN_PROC_BROWSER_TEST_F(GpuCrashTest, MANUAL_WebkitLoseContext) {
+#if defined(OS_MACOSX)
+  // crbug.com/173456
+  return;
+#endif
+
   DOMMessageQueue message_queue;
 
   NavigateToURL(