time metric: record elapsed time from when the backgrounded and purged renderer is foregrounded unti

content/renderer/render_thread_impl.h

 // Copyright (c) 2012 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.
 
 #ifndef CONTENT_RENDERER_RENDER_THREAD_IMPL_H_
 #define CONTENT_RENDERER_RENDER_THREAD_IMPL_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 478 matching lines @@
     size_t blink_gc_kb;
     size_t malloc_mb;
     size_t discardable_kb;
     size_t v8_main_thread_isolate_mb;
     size_t total_allocated_mb;
     size_t non_discardable_total_allocated_mb;
     size_t total_allocated_per_render_view_mb;
   };
   void GetRendererMemoryMetrics(RendererMemoryMetrics* memory_metrics) const;
 
+  void OnPostWidgetUpdateVisualState();
+
  protected:
   RenderThreadImpl(
       const InProcessChildThreadParams& params,
       std::unique_ptr<blink::scheduler::RendererScheduler> scheduler,
       const scoped_refptr<base::SingleThreadTaskRunner>& resource_task_queue);
   RenderThreadImpl(
       std::unique_ptr<base::MessageLoop> main_message_loop,
       std::unique_ptr<blink::scheduler::RendererScheduler> scheduler);
 
  private:
@@ skipping 250 matching lines @@
   mojo::AssociatedBinding<mojom::Renderer> renderer_binding_;
 
   mojom::RenderFrameMessageFilterAssociatedPtr render_frame_message_filter_;
   mojom::RenderMessageFilterAssociatedPtr render_message_filter_;
   scoped_refptr<mojom::ThreadSafeRenderMessageFilterAssociatedPtr>
       thread_safe_render_message_filter_;
 
   base::CancelableClosure record_purge_suspend_metric_closure_;
   RendererMemoryMetrics purge_and_suspend_memory_metrics_;
   base::CancelableClosure record_purge_suspend_growth_metric_closure_;
+  bool record_first_active_paint_;
+  base::TimeTicks foregrounded_time_;
 
   int32_t client_id_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderThreadImpl);
 };
 
 #if defined(COMPILER_MSVC)
 #pragma warning(pop)
 #endif
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_RENDER_THREAD_IMPL_H_