Defer compositor context creation to the thread.

cc/test/failure_output_surface.cc

Index: cc/test/failure_output_surface.cc
diff --git a/cc/test/failure_output_surface.cc b/cc/test/failure_output_surface.cc
index c0d5fdb0ad805e42b6c612c176316d64b3aba2dd..7a421a115cac03a5e20815b028790cc0fda251c5 100644
--- a/cc/test/failure_output_surface.cc
+++ b/cc/test/failure_output_surface.cc
@@ -4,11 +4,13 @@
 
 #include "cc/test/failure_output_surface.h"
 
+#include "base/memory/ptr_util.h"
+
 namespace cc {
 
 FailureOutputSurface::FailureOutputSurface(bool is_delegating)
-    : FakeOutputSurface(static_cast<ContextProvider*>(nullptr), is_delegating) {
-}
+    : FakeOutputSurface(base::WrapUnique<TestContextProvider::Factory>(nullptr),
+                        is_delegating) {}
 
 bool FailureOutputSurface::BindToClient(OutputSurfaceClient* client) {
   // This will force this output surface to not initialize in LTHI