Refactor renderer LayerTreeSettings generating code to common.

content/renderer/gpu/render_widget_compositor.cc

 // Copyright (c) 2013 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 "content/renderer/gpu/render_widget_compositor.h"
 
 #include <stddef.h>
 #include <limits>
 #include <string>
 #include <utility>
@@ skipping 23 matching lines @@
 #include "cc/output/copy_output_request.h"
 #include "cc/output/copy_output_result.h"
 #include "cc/output/latency_info_swap_promise.h"
 #include "cc/output/swap_promise.h"
 #include "cc/proto/compositor_message.pb.h"
 #include "cc/resources/single_release_callback.h"
 #include "cc/scheduler/begin_frame_source.h"
 #include "cc/trees/latency_info_swap_promise_monitor.h"
 #include "cc/trees/layer_tree_host.h"
 #include "cc/trees/remote_proto_channel.h"
+#include "content/common/compositor_util.h"
 #include "content/common/content_switches_internal.h"
 #include "content/common/gpu/client/context_provider_command_buffer.h"
 #include "content/public/common/content_client.h"
 #include "content/public/common/content_switches.h"
 #include "content/renderer/gpu/render_widget_compositor_delegate.h"
 #include "content/renderer/input/input_handler_manager.h"
 #include "gpu/command_buffer/client/gles2_interface.h"
 #include "gpu/command_buffer/service/gpu_switches.h"
 #include "third_party/WebKit/public/platform/WebCompositeAndReadbackAsyncCallback.h"
 #include "third_party/WebKit/public/platform/WebCompositorMutatorClient.h"
@@ skipping 283 matching lines @@
   settings.use_partial_raster = compositor_deps->IsPartialRasterEnabled();
   settings.enable_elastic_overscroll =
       compositor_deps->IsElasticOverscrollEnabled();
   settings.renderer_settings.use_gpu_memory_buffer_resources =
       compositor_deps->IsGpuMemoryBufferCompositorResourcesEnabled();
   settings.renderer_settings.buffer_to_texture_target_map =
       compositor_deps->GetBufferToTextureTargetMap();
   settings.image_decode_tasks_enabled =
       compositor_deps->AreImageDecodeTasksEnabled();
 
-  if (cmd.HasSwitch(cc::switches::kTopControlsShowThreshold)) {
-    std::string top_threshold_str =
-        cmd.GetSwitchValueASCII(cc::switches::kTopControlsShowThreshold);
-    double show_threshold;
-    if (base::StringToDouble(top_threshold_str, &show_threshold) &&
-        show_threshold >= 0.f && show_threshold <= 1.f)
-      settings.top_controls_show_threshold = show_threshold;
-  }
-
-  if (cmd.HasSwitch(cc::switches::kTopControlsHideThreshold)) {
-    std::string top_threshold_str =
-        cmd.GetSwitchValueASCII(cc::switches::kTopControlsHideThreshold);
-    double hide_threshold;
-    if (base::StringToDouble(top_threshold_str, &hide_threshold) &&
-        hide_threshold >= 0.f && hide_threshold <= 1.f)
-      settings.top_controls_hide_threshold = hide_threshold;
-  }
+  // Build LayerTreeSettings from command line args.
+  CompositorUtil::SetTopControlsSettings(settings, cmd);
 
   settings.use_layer_lists = cmd.HasSwitch(cc::switches::kEnableLayerLists);
 
   settings.renderer_settings.allow_antialiasing &=
       !cmd.HasSwitch(cc::switches::kDisableCompositedAntialiasing);
   // The means the renderer compositor has 2 possible modes:
   // - Threaded compositing with a scheduler.
   // - Single threaded compositing without a scheduler (for layout tests only).
   // Using the scheduler in layout tests introduces additional composite steps
   // that create flakiness.
@@ skipping 778 matching lines @@
 
   remote_proto_channel_receiver_->OnProtoReceived(std::move(deserialized));
 }
 
 void RenderWidgetCompositor::SetPaintedDeviceScaleFactor(
     float device_scale) {
   layer_tree_host_->GetLayerTree()->SetPaintedDeviceScaleFactor(device_scale);
 }
 
 }  // namespace content