cc: Remove legacy accelerated painting path

cc/trees/layer_tree_host.cc

Index: cc/trees/layer_tree_host.cc
diff --git a/cc/trees/layer_tree_host.cc b/cc/trees/layer_tree_host.cc
index b8b02bef8d3f08d61b67003e2e5faf211fa7b79c..6b7d7721889180546677aa2c2255bd83f4a28eb4 100644
--- a/cc/trees/layer_tree_host.cc
+++ b/cc/trees/layer_tree_host.cc
@@ -47,7 +47,6 @@ namespace cc {
 RendererCapabilities::RendererCapabilities()
     : best_texture_format(0),
       using_partial_swap(false),
-      using_accelerated_painting(false),
       using_set_visibility(false),
       using_swap_complete_callback(false),
       using_gpu_memory_manager(false),
@@ -169,11 +168,6 @@ LayerTreeHost::OnCreateAndInitializeOutputSurfaceAttempted(bool success) {
   if (success) {
     output_surface_lost_ = false;
 
-    // Update settings_ based on capabilities that we got back from the
-    // renderer.
-    settings_.accelerate_painting =
-        proxy_->GetRendererCapabilities().using_accelerated_painting;
-
     // Update settings_ based on partial update capability.
     size_t max_partial_texture_updates = 0;
     if (proxy_->GetRendererCapabilities().allow_partial_texture_updates &&