Ensure Origin Thread Affinity for BlameContext

content/renderer/top_level_blame_context.h

 // Copyright 2016 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_TOP_LEVEL_BLAME_CONTEXT_H_
 #define CONTENT_RENDERER_TOP_LEVEL_BLAME_CONTEXT_H_
 
 #include "base/trace_event/blame_context.h"
 
 namespace content {
 
 // A blame context which spans all the frames in this renderer. Used for
 // attributing work which cannot be associated with a specific frame (e.g.,
 // garbage collection).
 class TopLevelBlameContext : public base::trace_event::BlameContext {
  public:
   TopLevelBlameContext();
+  ~TopLevelBlameContext() override;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(TopLevelBlameContext);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_TOP_LEVEL_BLAME_CONTEXT_H_