Add support for (de)serializing cc::Layer properties.

cc/layers/layer_proto_converter_unittest.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "cc/layers/layer_proto_converter.h"
 
 #include "cc/layers/layer.h"
 #include "cc/proto/layer.pb.h"
 #include "cc/trees/layer_tree_settings.h"
 #include "testing/gtest/include/gtest/gtest.h"
@@ skipping 89 matching lines @@
   EXPECT_EQ(child_a_node->id(), child_a->id());
   EXPECT_EQ(child_b_node->id(), child_b->id());
 
   EXPECT_EQ(0u, child_a->children().size());
   ASSERT_EQ(1u, child_b->children().size());
 
   scoped_refptr<Layer> child_c = child_b->children()[0];
   EXPECT_EQ(child_c_node->id(), child_c->id());
 }
 
+TEST(LayerProtoConverterTest, DeserializeLayerProperties) {
+  /* Testing deserialization of properties for a tree that looks like this:
+          root*+
+          /  \
+         a    b+
+               \
+                c*
+     Layers marked with * have changed properties.
+     Layers marked with + have descendants with changed properties.
+  */
+  proto::LayerUpdate updates;
+
+  scoped_refptr<Layer> root = Layer::Create(LayerSettings());
+  proto::LayerProperties* root_props = updates.add_layers();
+  root_props->set_id(root->id());
+  root_props->set_needs_push_properties(true);
+  root_props->set_num_dependents_need_push_properties(1);
+  root_props->mutable_base();
+
+  scoped_refptr<Layer> a = Layer::Create(LayerSettings());
+  proto::LayerProperties* a_props = updates.add_layers();
+  a_props->set_id(a->id());
+  a_props->set_needs_push_properties(false);
+  a_props->set_num_dependents_need_push_properties(0);
+  root->AddChild(a);
+
+  scoped_refptr<Layer> b = Layer::Create(LayerSettings());
+  proto::LayerProperties* b_props = updates.add_layers();
+  b_props->set_id(b->id());
+  b_props->set_needs_push_properties(false);
+  b_props->set_num_dependents_need_push_properties(1);
+  root->AddChild(b);
+
+  scoped_refptr<Layer> c = Layer::Create(LayerSettings());
+  proto::LayerProperties* c_props = updates.add_layers();
+  c_props->set_id(c->id());
+  c_props->set_needs_push_properties(true);
+  c_props->set_num_dependents_need_push_properties(0);
+  c_props->mutable_base();
+  b->AddChild(c);
+
+  LayerProtoConverter::DeserializeLayerProperties(root, updates);
+
+  EXPECT_TRUE(root->needs_push_properties());
+  EXPECT_TRUE(root->descendant_needs_push_properties());
+
+  EXPECT_FALSE(a->needs_push_properties());
+  EXPECT_FALSE(a->descendant_needs_push_properties());
+
+  EXPECT_FALSE(b->needs_push_properties());
+  EXPECT_TRUE(b->descendant_needs_push_properties());
+
+  EXPECT_TRUE(c->needs_push_properties());
+  EXPECT_FALSE(c->descendant_needs_push_properties());
+}
+
 }  // namespace cc