Make sure FrameScheduler is cleared when LocalFrame::detach() finishes

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 06b064f61b76c7ce0b217dd8dd7341111ddaebf1..0c0f84ecf5687e91c7c832a3b09df2ec1f1e5991 100644
--- a/content/renderer/render_frame_impl.cc
+++ b/content/renderer/render_frame_impl.cc
@@ -1208,7 +1208,7 @@ void RenderFrameImpl::Initialize() {
 
 void RenderFrameImpl::InitializeBlameContext(RenderFrameImpl* parent_frame) {
   DCHECK(!blame_context_);
-  blame_context_ = new FrameBlameContext(this, parent_frame);
+  blame_context_ = base::WrapUnique(new FrameBlameContext(this, parent_frame));
   blame_context_->Initialize();
 }
 
@@ -2684,7 +2684,7 @@ blink::WebCookieJar* RenderFrameImpl::cookieJar() {
 
 blink::BlameContext* RenderFrameImpl::frameBlameContext() {
   DCHECK(blame_context_);
-  return blame_context_;
+  return blame_context_.get();
 }
 
 blink::WebServiceWorkerProvider*