Cleanup SurfaceVisibility code.

cc/output/delegating_renderer.cc

Index: cc/output/delegating_renderer.cc
diff --git a/cc/output/delegating_renderer.cc b/cc/output/delegating_renderer.cc
index 0a7d91cd5d7a59145713721b7a7fa03e75b08e45..365ee851952a1a8c9bb85ca09de29ae9e7a84b8d 100644
--- a/cc/output/delegating_renderer.cc
+++ b/cc/output/delegating_renderer.cc
@@ -114,12 +114,7 @@ void DelegatingRenderer::DidChangeVisibility() {
       context_provider->ContextGL()->Flush();
     }
   }
-  // We loop visibility to the GPU process, since that's what manages memory.
-  // That will allow it to feed us with memory allocations that we can act
-  // upon.
   if (context_provider) {
-    context_provider->ContextSupport()->SetSurfaceVisible(visible());
-
     // If we are not visible, we ask the context to aggressively free resources.
     context_provider->ContextSupport()->SetAggressivelyFreeResources(
         !visible());