Add buffer_to_texture_target_map to LayerTreeSettings

cc/layers/picture_layer_impl_unittest.cc

Index: cc/layers/picture_layer_impl_unittest.cc
diff --git a/cc/layers/picture_layer_impl_unittest.cc b/cc/layers/picture_layer_impl_unittest.cc
index d9c825906cc7cb8fd3c94608eeaceb315fbc528f..d7d28d05328a02a15ac7a28d7c8665c0a6065037 100644
--- a/cc/layers/picture_layer_impl_unittest.cc
+++ b/cc/layers/picture_layer_impl_unittest.cc
@@ -81,7 +81,7 @@ class PictureLayerImplTest : public TestLayerTreeHostBase {
     LayerTreeSettings settings;
     settings.layer_transforms_should_scale_layer_contents = true;
     settings.create_low_res_tiling = true;
-    settings.renderer_settings.buffer_to_texture_target_map =
+    settings.buffer_to_texture_target_map =
         DefaultBufferToTextureTargetMapForTesting();
     return settings;
   }