(not for commit) Simplified multi-threaded Ganesh with lock on Flush only.

cc/trees/layer_tree_host_unittest_context.cc

Index: cc/trees/layer_tree_host_unittest_context.cc
diff --git a/cc/trees/layer_tree_host_unittest_context.cc b/cc/trees/layer_tree_host_unittest_context.cc
index af9c7a68c15e3d49d32f3f3349ee7a454e73619b..bfc510780b14ae7ce72d0ccb699e62cc2cf62533 100644
--- a/cc/trees/layer_tree_host_unittest_context.cc
+++ b/cc/trees/layer_tree_host_unittest_context.cc
@@ -957,14 +957,9 @@ class LayerTreeHostContextTestDontUseLostResources
     child_output_surface_ = FakeOutputSurface::Create3d();
     child_output_surface_->BindToClient(&output_surface_client_);
     shared_bitmap_manager_.reset(new TestSharedBitmapManager());
-    child_resource_provider_ =
-        ResourceProvider::Create(child_output_surface_.get(),
-                                 shared_bitmap_manager_.get(),
-                                 NULL,
-                                 NULL,
-                                 0,
-                                 false,
-                                 1);
+    child_resource_provider_ = ResourceProvider::Create(
+        child_output_surface_.get(), shared_bitmap_manager_.get(), NULL, NULL,
+        0, false, false, 1);
   }
 
   static void EmptyReleaseCallback(unsigned sync_point, bool lost) {}