[LayoutNG] Remove out of date TODO comments

Tbr: kojii@chromium.org
Cq-Include-Trybots: master.tryserver.chromium.linux:linux_layout_tests_layout_ng
Change-Id: Id7f797b0c1804f030cb4fe142d514aab6b44ed92
Reviewed-on: https://chromium-review.googlesource.com/944503Reviewed-by: Emil A Eklund <eae@chromium.org>
Reviewed-by: Ian Kilpatrick <ikilpatrick@chromium.org>
Commit-Queue: Emil A Eklund <eae@chromium.org>
Cr-Commit-Position: refs/heads/master@{#540369}

third_party/WebKit/Source/core/layout/ng/inline/ng_text_fragment_builder.h

@@ -43,8 +43,6 @@ class CORE_EXPORT NGTextFragmentBuilder final : public NGBaseFragmentBuilder {
   NGLogicalSize size_;
   scoped_refptr<const ShapeResult> shape_result_;
   NGTextEndEffect end_effect_ = NGTextEndEffect::kNone;
-
-  // TODO(eae): Replace with Node pointer.
   LayoutObject* layout_object_ = nullptr;
 
   // Not used in NG paint, only to copy to InlineTextBox::SetExpansion().

third_party/WebKit/Source/core/layout/ng/ng_physical_fragment.cc

@@ -217,8 +217,6 @@ const ComputedStyle& NGPhysicalFragment::Style() const {
 }
 
 Node* NGPhysicalFragment::GetNode() const {
-  // TODO(layout-dev): This should store the node directly instead of going
-  // through LayoutObject.
   return layout_object_ ? layout_object_->GetNode() : nullptr;
 }