Add support for LayerTreeSettings (de)serialization

cc/trees/layer_tree_settings_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/trees/layer_tree_settings.h"
+
+#include "cc/proto/layer_tree_settings.pb.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace cc {
+namespace {
+
+void VerifySerializeAndDeserialize(const LayerTreeSettings& settings1) {
+  proto::LayerTreeSettings proto;
+  settings1.ToProtobuf(&proto);
+  LayerTreeSettings settings2;
+  settings2.FromProtobuf(proto);
+  EXPECT_EQ(settings1, settings2);
+}
+
+TEST(LayerTreeSettingsTest, DefaultValues) {
+  LayerTreeSettings settings;
+  VerifySerializeAndDeserialize(settings);
+}
+
+TEST(LayerTreeSettingsTest, AllMembersFlipped) {

[vmpstr, 2015/12/10 00:51:24]

nit: s/Flipped/Changed/

[nyquist, 2015/12/10 01:22:56]

Done.

+  LayerTreeSettings settings;
+  RendererSettings rs;
+  rs.texture_id_allocation_chunk_size =
+      rs.texture_id_allocation_chunk_size * 3 + 1;
+  settings.renderer_settings = rs;
+  settings.single_thread_proxy_scheduler =
+      !settings.single_thread_proxy_scheduler;
+  settings.use_external_begin_frame_source =
+      !settings.use_external_begin_frame_source;
+  settings.main_frame_before_activation_enabled =
+      !settings.main_frame_before_activation_enabled;
+  settings.using_synchronous_renderer_compositor =
+      !settings.using_synchronous_renderer_compositor;
+  settings.accelerated_animation_enabled =
+      !settings.accelerated_animation_enabled;
+  settings.can_use_lcd_text = !settings.can_use_lcd_text;
+  settings.use_distance_field_text = !settings.use_distance_field_text;
+  settings.gpu_rasterization_enabled = !settings.gpu_rasterization_enabled;
+  settings.gpu_rasterization_forced = !settings.gpu_rasterization_forced;
+  settings.gpu_rasterization_msaa_sample_count =
+      settings.gpu_rasterization_msaa_sample_count * 3 + 1;
+  settings.gpu_rasterization_skewport_target_time_in_seconds =
+      settings.gpu_rasterization_skewport_target_time_in_seconds * 3 + 1;
+  settings.create_low_res_tiling = !settings.create_low_res_tiling;
+  settings.scrollbar_animator = LayerTreeSettings::THINNING;
+  settings.scrollbar_fade_delay_ms = settings.scrollbar_fade_delay_ms * 3 + 1;
+  settings.scrollbar_fade_resize_delay_ms =
+      settings.scrollbar_fade_resize_delay_ms * 3 + 1;
+  settings.scrollbar_fade_duration_ms =
+      settings.scrollbar_fade_duration_ms * 3 + 1;
+  settings.solid_color_scrollbar_color = SK_ColorCYAN;
+  settings.timeout_and_draw_when_animation_checkerboards =
+      !settings.timeout_and_draw_when_animation_checkerboards;
+  settings.layer_transforms_should_scale_layer_contents =
+      !settings.layer_transforms_should_scale_layer_contents;
+  settings.layers_always_allowed_lcd_text =
+      !settings.layers_always_allowed_lcd_text;
+  settings.minimum_contents_scale = 0.42f;
+  settings.low_res_contents_scale_factor = 0.43f;
+  settings.top_controls_show_threshold = 0.44f;
+  settings.top_controls_hide_threshold = 0.45f;
+  settings.background_animation_rate = 0.46f;
+  settings.default_tile_size = gfx::Size(47, 48);
+  settings.max_untiled_layer_size = gfx::Size(49, 50);
+  settings.minimum_occlusion_tracking_size = gfx::Size(51, 52);
+  settings.tiling_interest_area_padding =
+      settings.tiling_interest_area_padding * 3 + 1;
+  settings.skewport_target_time_in_seconds = 0.53f;
+  settings.skewport_extrapolation_limit_in_content_pixels =
+      settings.skewport_extrapolation_limit_in_content_pixels * 3 + 1;
+  settings.max_memory_for_prepaint_percentage =
+      settings.max_memory_for_prepaint_percentage * 3 + 1;
+  settings.strict_layer_property_change_checking =
+      !settings.strict_layer_property_change_checking;
+  settings.use_zero_copy = !settings.use_zero_copy;
+  settings.use_partial_raster = !settings.use_partial_raster;
+  settings.enable_elastic_overscroll = !settings.enable_elastic_overscroll;
+  settings.use_image_texture_targets.push_back(54);
+  settings.use_image_texture_targets.push_back(55);
+  settings.ignore_root_layer_flings = !settings.ignore_root_layer_flings;
+  settings.scheduled_raster_task_limit =
+      settings.scheduled_raster_task_limit * 3 + 1;
+  settings.use_occlusion_for_tile_prioritization =
+      !settings.use_occlusion_for_tile_prioritization;
+  settings.use_property_trees = !settings.use_property_trees;
+  settings.use_compositor_animation_timelines =
+      !settings.use_compositor_animation_timelines;
+  settings.wait_for_beginframe_interval =
+      !settings.wait_for_beginframe_interval;
+  settings.max_staging_buffer_usage_in_bytes =
+      settings.max_staging_buffer_usage_in_bytes * 3 + 1;
+  settings.memory_policy_ = ManagedMemoryPolicy(
+      56, gpu::MemoryAllocation::CUTOFF_ALLOW_NICE_TO_HAVE, 57);
+  LayerTreeDebugState debug_state;
+  debug_state.show_fps_counter = !debug_state.show_fps_counter;
+  settings.initial_debug_state = debug_state;
+  VerifySerializeAndDeserialize(settings);
+}
+
+TEST(LayerTreeSettingsTest, ArbitraryValues) {
+  LayerTreeSettings settings;
+  RendererSettings rs;
+  rs.texture_id_allocation_chunk_size = 42;
+  settings.renderer_settings = rs;
+  settings.single_thread_proxy_scheduler = true;
+  settings.use_external_begin_frame_source = true;
+  settings.main_frame_before_activation_enabled = true;
+  settings.using_synchronous_renderer_compositor = false;
+  settings.accelerated_animation_enabled = true;
+  settings.can_use_lcd_text = false;
+  settings.use_distance_field_text = false;
+  settings.gpu_rasterization_enabled = false;
+  settings.gpu_rasterization_forced = true;
+  settings.gpu_rasterization_msaa_sample_count = 10;
+  settings.gpu_rasterization_skewport_target_time_in_seconds = 0.909f;
+  settings.create_low_res_tiling = false;
+  settings.scrollbar_animator = LayerTreeSettings::LINEAR_FADE;
+  settings.scrollbar_fade_delay_ms = 13;
+  settings.scrollbar_fade_resize_delay_ms = 61;
+  settings.scrollbar_fade_duration_ms = 23;
+  settings.solid_color_scrollbar_color = SK_ColorCYAN;
+  settings.timeout_and_draw_when_animation_checkerboards = true;
+  settings.layer_transforms_should_scale_layer_contents = true;
+  settings.layers_always_allowed_lcd_text = true;
+  settings.minimum_contents_scale = 0.314f;
+  settings.low_res_contents_scale_factor = 0.49f;
+  settings.top_controls_hide_threshold = 0.666f;
+  settings.top_controls_hide_threshold = 0.51f;
+  settings.background_animation_rate = 0.52f;
+  settings.default_tile_size = gfx::Size(53, 54);
+  settings.max_untiled_layer_size = gfx::Size(55, 56);
+  settings.minimum_occlusion_tracking_size = gfx::Size(57, 58);
+  settings.tiling_interest_area_padding = 59;
+  settings.skewport_target_time_in_seconds = 0.6f;
+  settings.skewport_extrapolation_limit_in_content_pixels = 61;
+  settings.max_memory_for_prepaint_percentage = 62;
+  settings.strict_layer_property_change_checking = true;
+  settings.use_zero_copy = true;
+  settings.use_partial_raster = true;
+  settings.enable_elastic_overscroll = false;
+  settings.use_image_texture_targets.push_back(10);
+  settings.use_image_texture_targets.push_back(19);
+  settings.ignore_root_layer_flings = true;
+  settings.scheduled_raster_task_limit = 41;
+  settings.use_occlusion_for_tile_prioritization = true;
+  settings.use_property_trees = true;
+  settings.use_compositor_animation_timelines = true;
+  settings.wait_for_beginframe_interval = true;
+  settings.max_staging_buffer_usage_in_bytes = 70;
+  settings.memory_policy_ = ManagedMemoryPolicy(
+      71, gpu::MemoryAllocation::CUTOFF_ALLOW_NICE_TO_HAVE, 77);
+  LayerTreeDebugState debug_state;
+  debug_state.show_fps_counter = true;
+  settings.initial_debug_state = debug_state;
+  VerifySerializeAndDeserialize(settings);
+}
+
+}  // namespace
+}  // namespace cc