Implement frame attribution (FrameBlamer)

content/renderer/render_frame_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_frame_blame_context.h"
+
+#include "content/renderer/render_thread_blame_context.h"
+
+namespace content {
+
+const char kRenderFrameBlameCategory[] = "blink";
+const char kRenderFrameBlameName[] = "FrameBlameContext";
+const char kRenderFrameBlameScope[] = "RenderFrame";
+
+RenderFrameBlameContext::RenderFrameBlameContext(
+    int routing_id,
+    const RenderThreadBlameContext& parent)
+    : base::debug::BlameContext<kRenderFrameBlameCategory,
+                                kRenderFrameBlameName,
+                                kRenderFrameBlameScope>(routing_id, parent) {}
+
+RenderFrameBlameContext::RenderFrameBlameContext(
+    int routing_id,
+    const RenderFrameBlameContext& parent)
+    : base::debug::BlameContext<kRenderFrameBlameCategory,
+                                kRenderFrameBlameName,
+                                kRenderFrameBlameScope>(routing_id, parent) {}
+
+void RenderFrameBlameContext::AsValueInto(
+    base::trace_event::TracedValue* state) {
+  base::debug::BlameContext<kRenderFrameBlameCategory, kRenderFrameBlameName,
+                            kRenderFrameBlameScope>::AsValueInto(state);
+  // TODO(skyostil): WebSecurityContext goes here.
+  state->SetString("url", "url_goes_here");
+}
+
+}  // namespace content