Implement frame attribution (FrameBlamer)

content/renderer/render_frame_impl.cc

Index: content/renderer/render_frame_impl.cc
diff --git a/content/renderer/render_frame_impl.cc b/content/renderer/render_frame_impl.cc
index ccb65b33f567065bbc6b8571c2b6ee8bc3ece25f..83148d14251d6bbc3e7c789032ce9b342124d74e 100644
--- a/content/renderer/render_frame_impl.cc
+++ b/content/renderer/render_frame_impl.cc
@@ -29,6 +29,7 @@
 #include "base/strings/utf_string_conversions.h"
 #include "base/thread_task_runner_handle.h"
 #include "base/time/time.h"
+#include "base/trace_event/trace_event_argument.h"
 #include "build/build_config.h"
 #include "cc/base/switches.h"
 #include "components/scheduler/renderer/renderer_scheduler.h"
@@ -1094,8 +1095,17 @@ void RenderFrameImpl::Initialize() {
 
   RenderFrameImpl* parent_frame = RenderFrameImpl::FromWebFrame(
       frame_->parent());
-  if (parent_frame)
+  if (parent_frame) {
     is_using_lofi_ = parent_frame->IsUsingLoFi();
+    blame_context_ = make_scoped_ptr(new RenderFrameBlameContext(
+        routing_id_, *parent_frame->blame_context_));
+  } else {
+    blame_context_ = make_scoped_ptr(new RenderFrameBlameContext(
+        routing_id_, *RenderThreadImpl::current()->blame_context()));
+  }
+  web_blame_context_ =
+      make_scoped_ptr(new WebBlameContextImpl(blame_context_.get()));
+  blame_context_->TakeSnapshot();
 
   bool is_tracing = false;
   TRACE_EVENT_CATEGORY_GROUP_ENABLED("navigation", &is_tracing);
@@ -2586,6 +2596,10 @@ blink::WebCookieJar* RenderFrameImpl::cookieJar() {
   return &cookie_jar_;
 }
 
+blink::WebBlameContext* RenderFrameImpl::frameBlameContext() {
+  return web_blame_context_.get();
+}
+
 blink::WebServiceWorkerProvider*
 RenderFrameImpl::createServiceWorkerProvider() {
   // At this point we should have non-null data source.