Update from https://crrev.com/317530

cc/trees/layer_tree_host.cc

 // Copyright 2011 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_host.h"
 
 #include <algorithm>
 #include <stack>
 #include <string>
 
@@ skipping 115 matching lines @@
       min_page_scale_factor_(1.f),
       max_page_scale_factor_(1.f),
       has_gpu_rasterization_trigger_(false),
       content_is_suitable_for_gpu_rasterization_(true),
       gpu_rasterization_histogram_recorded_(false),
       background_color_(SK_ColorWHITE),
       has_transparent_background_(false),
       partial_texture_update_requests_(0),
       did_complete_scale_animation_(false),
       in_paint_layer_contents_(false),
-      total_frames_used_for_lcd_text_metrics_(0),
       id_(s_layer_tree_host_sequence_number.GetNext() + 1),
       next_commit_forces_redraw_(false),
       shared_bitmap_manager_(shared_bitmap_manager),
       gpu_memory_buffer_manager_(gpu_memory_buffer_manager),
       surface_id_namespace_(0u),
       next_surface_sequence_(1u) {
   if (settings_.accelerated_animation_enabled)
     animation_registrar_ = AnimationRegistrar::Create();
   rendering_stats_instrumentation_->set_record_rendering_stats(
       debug_state_.RecordRenderingStats());
@@ skipping 79 matching lines @@
 void LayerTreeHost::WillBeginMainFrame() {
   devtools_instrumentation::WillBeginMainThreadFrame(id(),
                                                      source_frame_number());
   client_->WillBeginMainFrame();
 }
 
 void LayerTreeHost::DidBeginMainFrame() {
   client_->DidBeginMainFrame();
 }
 
+void LayerTreeHost::BeginMainFrameNotExpectedSoon() {
+  client_->BeginMainFrameNotExpectedSoon();
+}
+
 void LayerTreeHost::BeginMainFrame(const BeginFrameArgs& args) {
   inside_begin_main_frame_ = true;
   client_->BeginMainFrame(args);
   inside_begin_main_frame_ = false;
 }
 
 void LayerTreeHost::DidStopFlinging() {
   proxy_->MainThreadHasStoppedFlinging();
 }
 
@@ skipping 306 matching lines @@
     int event_layer_id = (*events)[event_index].layer_id;
 
     // Use the map of all controllers, not just active ones, since non-active
     // controllers may still receive events for impl-only animations.
     const AnimationRegistrar::AnimationControllerMap& animation_controllers =
         animation_registrar_->all_animation_controllers();
     AnimationRegistrar::AnimationControllerMap::const_iterator iter =
         animation_controllers.find(event_layer_id);
     if (iter != animation_controllers.end()) {
       switch ((*events)[event_index].type) {
-        case AnimationEvent::Started:
+        case AnimationEvent::STARTED:
           (*iter).second->NotifyAnimationStarted((*events)[event_index]);
           break;
 
-        case AnimationEvent::Finished:
+        case AnimationEvent::FINISHED:
           (*iter).second->NotifyAnimationFinished((*events)[event_index]);
           break;
 
-        case AnimationEvent::Aborted:
+        case AnimationEvent::ABORTED:
           (*iter).second->NotifyAnimationAborted((*events)[event_index]);
           break;
 
-        case AnimationEvent::PropertyUpdate:
+        case AnimationEvent::PROPERTY_UPDATE:
           (*iter).second->NotifyAnimationPropertyUpdate((*events)[event_index]);
           break;
       }
     }
   }
 }
 
 void LayerTreeHost::SetRootLayer(scoped_refptr<Layer> root_layer) {
   if (root_layer_.get() == root_layer.get())
     return;
@@ skipping 217 matching lines @@
                           content_is_suitable_for_gpu_rasterization_);
     // Record how many pages actually get gpu rasterization when enabled.
     UMA_HISTOGRAM_BOOLEAN("Renderer4.GpuRasterizationUsed",
                           (has_gpu_rasterization_trigger_ &&
                            content_is_suitable_for_gpu_rasterization_));
   }
 
   gpu_rasterization_histogram_recorded_ = true;
 }
 
-void LayerTreeHost::CalculateLCDTextMetricsCallback(Layer* layer) {
-  if (!layer->SupportsLCDText())
-    return;
-
-  lcd_text_metrics_.total_num_cc_layers++;
-  if (layer->draw_properties().can_use_lcd_text) {
-    lcd_text_metrics_.total_num_cc_layers_can_use_lcd_text++;
-    if (layer->contents_opaque())
-      lcd_text_metrics_.total_num_cc_layers_will_use_lcd_text++;
-  }
-}
-
 bool LayerTreeHost::UsingSharedMemoryResources() {
   return GetRendererCapabilities().using_shared_memory_resources;
 }
 
 bool LayerTreeHost::UpdateLayers(Layer* root_layer,
                                  ResourceUpdateQueue* queue) {
   TRACE_EVENT1("cc", "LayerTreeHost::UpdateLayers",
                "source_frame_number", source_frame_number());
 
   RenderSurfaceLayerList update_list;
@@ skipping 20 matching lines @@
         root_layer, device_viewport_size(), gfx::Transform(),
         device_scale_factor_, page_scale_factor_, page_scale_layer,
         elastic_overscroll_, overscroll_elasticity_layer_.get(),
         GetRendererCapabilities().max_texture_size, settings_.can_use_lcd_text,
         settings_.layers_always_allowed_lcd_text,
         can_render_to_separate_surface,
         settings_.layer_transforms_should_scale_layer_contents,
         settings_.verify_property_trees, &update_list,
         render_surface_layer_list_id);
     LayerTreeHostCommon::CalculateDrawProperties(&inputs);
-
-    if (total_frames_used_for_lcd_text_metrics_ <=
-        kTotalFramesToUseForLCDTextMetrics) {
-      LayerTreeHostCommon::CallFunctionForSubtree(
-          root_layer,
-          base::Bind(&LayerTreeHost::CalculateLCDTextMetricsCallback,
-                     base::Unretained(this)));
-      total_frames_used_for_lcd_text_metrics_++;
-    }
-
-    if (total_frames_used_for_lcd_text_metrics_ ==
-        kTotalFramesToUseForLCDTextMetrics) {
-      total_frames_used_for_lcd_text_metrics_++;
-
-      UMA_HISTOGRAM_PERCENTAGE(
-          "Renderer4.LCDText.PercentageOfCandidateLayers",
-          lcd_text_metrics_.total_num_cc_layers_can_use_lcd_text * 100.0 /
-          lcd_text_metrics_.total_num_cc_layers);
-      UMA_HISTOGRAM_PERCENTAGE(
-          "Renderer4.LCDText.PercentageOfAALayers",
-          lcd_text_metrics_.total_num_cc_layers_will_use_lcd_text * 100.0 /
-          lcd_text_metrics_.total_num_cc_layers_can_use_lcd_text);
-    }
   }
 
   // Reset partial texture update requests.
   partial_texture_update_requests_ = 0;
 
   bool did_paint_content = false;
   bool need_more_updates = false;
   PaintLayerContents(
       update_list, queue, &did_paint_content, &need_more_updates);
   if (need_more_updates) {
@@ skipping 347 matching lines @@
 }
 
 UIResourceId LayerTreeHost::CreateUIResource(UIResourceClient* client) {
   DCHECK(client);
 
   UIResourceId next_id = next_ui_resource_id_++;
   DCHECK(ui_resource_client_map_.find(next_id) ==
          ui_resource_client_map_.end());
 
   bool resource_lost = false;
-  UIResourceRequest request(UIResourceRequest::UIResourceCreate,
-                            next_id,
+  UIResourceRequest request(UIResourceRequest::UI_RESOURCE_CREATE, next_id,
                             client->GetBitmap(next_id, resource_lost));
   ui_resource_request_queue_.push_back(request);
 
   UIResourceClientData data;
   data.client = client;
   data.size = request.GetBitmap().GetSize();
 
   ui_resource_client_map_[request.GetId()] = data;
   return request.GetId();
 }
 
 // Deletes a UI resource.  May safely be called more than once.
 void LayerTreeHost::DeleteUIResource(UIResourceId uid) {
   UIResourceClientMap::iterator iter = ui_resource_client_map_.find(uid);
   if (iter == ui_resource_client_map_.end())
     return;
 
-  UIResourceRequest request(UIResourceRequest::UIResourceDelete, uid);
+  UIResourceRequest request(UIResourceRequest::UI_RESOURCE_DELETE, uid);
   ui_resource_request_queue_.push_back(request);
   ui_resource_client_map_.erase(iter);
 }
 
 void LayerTreeHost::RecreateUIResources() {
   for (UIResourceClientMap::iterator iter = ui_resource_client_map_.begin();
        iter != ui_resource_client_map_.end();
        ++iter) {
     UIResourceId uid = iter->first;
     const UIResourceClientData& data = iter->second;
     bool resource_lost = true;
-    UIResourceRequest request(UIResourceRequest::UIResourceCreate,
-                              uid,
+    UIResourceRequest request(UIResourceRequest::UI_RESOURCE_CREATE, uid,
                               data.client->GetBitmap(uid, resource_lost));
     ui_resource_request_queue_.push_back(request);
   }
 }
 
 // Returns the size of a resource given its id.
 gfx::Size LayerTreeHost::GetUIResourceSize(UIResourceId uid) const {
   UIResourceClientMap::const_iterator iter = ui_resource_client_map_.find(uid);
   if (iter == ui_resource_client_map_.end())
     return gfx::Size();
@@ skipping 73 matching lines @@
     bool children_need_begin_frames) const {
   proxy_->SetChildrenNeedBeginFrames(children_need_begin_frames);
 }
 
 void LayerTreeHost::SendBeginFramesToChildren(
     const BeginFrameArgs& args) const {
   client_->SendBeginFramesToChildren(args);
 }
 
 }  // namespace cc