Implement frame attribution (FrameBlamer)

content/renderer/render_thread_blame_context.cc

+// 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.
+
+#include "content/renderer/render_thread_blame_context.h"
+
+#include "base/threading/platform_thread.h"
+#include "content/renderer/render_frame_blame_context.h"
+
+namespace content {
+
+const char kRenderThreadBlameCategory[] = "blink";
+const char kRenderThreadBlameName[] = "FrameBlameContext";
+const char kRenderThreadBlameScope[] = "PlatformThread";
+
+RenderThreadBlameContext::RenderThreadBlameContext()
+    : base::debug::BlameContext<kRenderThreadBlameCategory,
+                                kRenderThreadBlameName,
+                                kRenderThreadBlameScope>(
+          base::PlatformThread::CurrentId()) {}
+
+}  // namespace content