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 kRenderThreadBlameContextCategory[] = "blink";
+const char kRenderThreadBlameContextName[] = "FrameBlameContext";
+const char kRenderThreadBlameContextType[] = "RenderThread";
+const char kRenderThreadBlameContextScope[] = "PlatformThread";
+
+RenderThreadBlameContext::RenderThreadBlameContext()
+    : base::trace_event::BlameContext(kRenderThreadBlameContextCategory,
+                                      kRenderThreadBlameContextName,
+                                      kRenderThreadBlameContextType,
+                                      kRenderThreadBlameContextScope,
+                                      base::PlatformThread::CurrentId(),
+                                      nullptr) {}
+
+}  // namespace content