cc: Remove unused proto conversion code.

cc/trees/layer_tree.cc

Index: cc/trees/layer_tree.cc
diff --git a/cc/trees/layer_tree.cc b/cc/trees/layer_tree.cc
index 0d530d62687633e9fd8f0b119d3f558ea8e1fc12..bf07576cc69500ff0e9f14a4e76bfb444e1a2384 100644
--- a/cc/trees/layer_tree.cc
+++ b/cc/trees/layer_tree.cc
@@ -10,7 +10,6 @@
 #include "cc/layers/heads_up_display_layer.h"
 #include "cc/layers/heads_up_display_layer_impl.h"
 #include "cc/layers/layer.h"
-#include "cc/layers/layer_proto_converter.h"
 #include "cc/proto/gfx_conversions.h"
 #include "cc/proto/layer_tree.pb.h"
 #include "cc/trees/layer_tree_host.h"
@@ -21,27 +20,6 @@
 
 namespace cc {
 
-namespace {
-
-Layer* UpdateAndGetLayer(Layer* current_layer,
-                         int layer_id,
-                         LayerTree* layer_tree) {
-  if (layer_id == Layer::INVALID_ID) {
-    if (current_layer)
-      current_layer->SetLayerTreeHost(nullptr);
-
-    return nullptr;
-  }
-  Layer* layer = layer_tree->LayerById(layer_id);
-  DCHECK(layer);
-  if (current_layer && current_layer != layer)
-    current_layer->SetLayerTreeHost(nullptr);
-
-  return layer;
-}
-
-}  // namespace
-
 LayerTree::Inputs::Inputs()
     : top_controls_height(0.f),
       top_controls_shown_ratio(0.f),
@@ -429,11 +407,9 @@ void LayerTree::PushPropertiesTo(LayerTreeImpl* tree_impl,
   tree_impl->set_has_ever_been_drawn(false);
 }
 
-void LayerTree::ToProtobuf(proto::LayerTree* proto, bool inputs_only) {
+void LayerTree::ToProtobuf(proto::LayerTree* proto) {
   TRACE_EVENT0("cc.remote", "LayerProtoConverter::SerializeLayerHierarchy");
 
-  // LayerTree::Inputs Serialization -----------------------------------------
-
   // TODO(khushalsagar): Why walk the tree twice? Why not serialize properties
   // for dirty layers as you serialize the hierarchy?
   if (inputs_.root_layer)
@@ -481,95 +457,6 @@ void LayerTree::ToProtobuf(proto::LayerTree* proto, bool inputs_only) {
   proto->set_touch_end_or_cancel_event_listener_properties(
       static_cast<uint32_t>(
           event_listener_properties(EventListenerClass::kTouchEndOrCancel)));
-
-  if (inputs_only)
-    return;
-  // ----------------------------------------------------------------------
-
-  for (auto* layer : layers_that_should_push_properties_) {
-    proto->add_layers_that_should_push_properties(layer->id());
-  }
-  proto->set_in_paint_layer_contents(in_paint_layer_contents());
-
-  proto->set_needs_full_tree_sync(needs_full_tree_sync_);
-  proto->set_needs_meta_info_recomputation(needs_meta_info_recomputation_);
-  proto->set_hud_layer_id(hud_layer_ ? hud_layer_->id() : Layer::INVALID_ID);
-
-  property_trees_.ToProtobuf(proto->mutable_property_trees());
-  Vector2dFToProto(elastic_overscroll_, proto->mutable_elastic_overscroll());
-}
-
-void LayerTree::FromProtobuf(const proto::LayerTree& proto) {
-  // Layer hierarchy.
-  scoped_refptr<Layer> new_root_layer;
-  if (proto.has_root_layer())
-    new_root_layer = LayerProtoConverter::DeserializeLayerHierarchy(
-        inputs_.root_layer, proto.root_layer(), layer_tree_host_);
-  if (inputs_.root_layer != new_root_layer) {
-    inputs_.root_layer = new_root_layer;
-  }
-
-  for (auto layer_id : proto.layers_that_should_push_properties()) {
-    AddLayerShouldPushProperties(layer_id_map_[layer_id]);
-  }
-  in_paint_layer_contents_ = proto.in_paint_layer_contents();
-
-  needs_full_tree_sync_ = proto.needs_full_tree_sync();
-  needs_meta_info_recomputation_ = proto.needs_meta_info_recomputation();
-
-  inputs_.overscroll_elasticity_layer =
-      UpdateAndGetLayer(inputs_.overscroll_elasticity_layer.get(),
-                        proto.overscroll_elasticity_layer_id(), this);
-  inputs_.page_scale_layer = UpdateAndGetLayer(
-      inputs_.page_scale_layer.get(), proto.page_scale_layer_id(), this);
-  inputs_.inner_viewport_scroll_layer =
-      UpdateAndGetLayer(inputs_.inner_viewport_scroll_layer.get(),
-                        proto.inner_viewport_scroll_layer_id(), this);
-  inputs_.outer_viewport_scroll_layer =
-      UpdateAndGetLayer(inputs_.outer_viewport_scroll_layer.get(),
-                        proto.outer_viewport_scroll_layer_id(), this);
-
-  inputs_.device_viewport_size = ProtoToSize(proto.device_viewport_size());
-  inputs_.device_scale_factor = proto.device_scale_factor();
-  inputs_.painted_device_scale_factor = proto.painted_device_scale_factor();
-  inputs_.page_scale_factor = proto.page_scale_factor();
-  inputs_.min_page_scale_factor = proto.min_page_scale_factor();
-  inputs_.max_page_scale_factor = proto.max_page_scale_factor();
-  inputs_.background_color = proto.background_color();
-  inputs_.has_transparent_background = proto.has_transparent_background();
-  inputs_.have_scroll_event_handlers = proto.have_scroll_event_handlers();
-  inputs_.event_listener_properties[static_cast<size_t>(
-      EventListenerClass::kMouseWheel)] =
-      static_cast<EventListenerProperties>(
-          proto.wheel_event_listener_properties());
-  inputs_.event_listener_properties[static_cast<size_t>(
-      EventListenerClass::kTouchStartOrMove)] =
-      static_cast<EventListenerProperties>(
-          proto.touch_start_or_move_event_listener_properties());
-  inputs_.event_listener_properties[static_cast<size_t>(
-      EventListenerClass::kTouchEndOrCancel)] =
-      static_cast<EventListenerProperties>(
-          proto.touch_end_or_cancel_event_listener_properties());
-
-  hud_layer_ = static_cast<HeadsUpDisplayLayer*>(
-      UpdateAndGetLayer(hud_layer_.get(), proto.hud_layer_id(), this));
-
-  LayerSelectionFromProtobuf(&inputs_.selection, proto.selection());
-  elastic_overscroll_ = ProtoToVector2dF(proto.elastic_overscroll());
-
-  // It is required to create new PropertyTrees before deserializing it.
-  property_trees_ = PropertyTrees();
-  property_trees_.FromProtobuf(proto.property_trees());
-
-  // Forcefully override the sequence number of all layers in the tree to have
-  // a valid sequence number. Changing the sequence number for a layer does not
-  // need a commit, so the value will become out of date for layers that are not
-  // updated for other reasons. All layers that at this point are part of the
-  // layer tree are valid, so it is OK that they have a valid sequence number.
-  int seq_num = property_trees_.sequence_number;
-  LayerTreeHostCommon::CallFunctionForEveryLayer(this, [seq_num](Layer* layer) {
-    layer->set_property_tree_sequence_number(seq_num);
-  });
 }
 
 Layer* LayerTree::LayerByElementId(ElementId element_id) const {