Revert "Enable LayoutNG for BUTTON elements and INPUT buttons by default"

This reverts commit f1a2ccf7.

Reason for revert: Caused multiple memory regressions

Original change's description:
> Enable LayoutNG for BUTTON elements and INPUT buttons by default
> 
> Bug: 1040826
> Change-Id: I0a2f9db962e74a44758293e0711009617e6a42d3
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2354119
> Commit-Queue: Kent Tamura <tkent@chromium.org>
> Commit-Queue: Koji Ishii <kojii@chromium.org>
> Auto-Submit: Kent Tamura <tkent@chromium.org>
> Reviewed-by: Koji Ishii <kojii@chromium.org>
> Reviewed-by: Yoshifumi Inoue <yosin@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#797991}

Change-Id: Iac0d9d51d658f1b45c854bf030f28821f907d94f
Tbr: yosin@chromium.org,tkent@chromium.org,kojii@chromium.org
Bug: 1040826, 1116415, 1116447
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2360104Reviewed-by: Kent Tamura <tkent@chromium.org>
Reviewed-by: Koji Ishii <kojii@chromium.org>
Reviewed-by: Yoshifumi Inoue <yosin@chromium.org>
Commit-Queue: Kent Tamura <tkent@chromium.org>
Cr-Commit-Position: refs/heads/master@{#799010}

third_party/blink/public/mojom/web_feature/web_feature.mojom

@@ -2535,6 +2535,7 @@ enum WebFeature {
 
   kV8Document_HasTrustToken_Method = 3202,
   kForceLoadAtTop = 3203,
+  kLegacyLayoutByButton = 3204,
   kLegacyLayoutByDeprecatedFlexBox = 3205,
   kLegacyLayoutByDetailsMarker = 3206,
   kLegacyLayoutByEditing = 3207,

third_party/blink/renderer/core/html/forms/base_button_input_type.cc

@@ -33,6 +33,7 @@
 
 #include "third_party/blink/renderer/core/dom/shadow_root.h"
 #include "third_party/blink/renderer/core/dom/text.h"
+#include "third_party/blink/renderer/core/frame/web_feature.h"
 #include "third_party/blink/renderer/core/html/forms/html_form_element.h"
 #include "third_party/blink/renderer/core/html/forms/html_input_element.h"
 #include "third_party/blink/renderer/core/html/parser/html_parser_idioms.h"
@@ -74,6 +75,14 @@ bool BaseButtonInputType::ShouldSaveAndRestoreFormControlState() const {
 
 void BaseButtonInputType::AppendToFormData(FormData&) const {}
 
+bool BaseButtonInputType::TypeShouldForceLegacyLayout() const {
+  if (RuntimeEnabledFeatures::LayoutNGForControlsEnabled())
+    return false;
+  UseCounter::Count(GetElement().GetDocument(),
+                    WebFeature::kLegacyLayoutByButton);
+  return true;
+}
+
 LayoutObject* BaseButtonInputType::CreateLayoutObject(
     const ComputedStyle& style,
     LegacyLayout legacy) const {

third_party/blink/renderer/core/html/forms/base_button_input_type.h

@@ -52,6 +52,7 @@ class BaseButtonInputType : public InputType,
   InputTypeView* CreateView() override;
   bool ShouldSaveAndRestoreFormControlState() const override;
   void AppendToFormData(FormData&) const override;
+  bool TypeShouldForceLegacyLayout() const override;
   LayoutObject* CreateLayoutObject(const ComputedStyle&,
                                    LegacyLayout) const override;
   ValueMode GetValueMode() const override;

third_party/blink/renderer/core/html/forms/html_button_element.cc

@@ -46,6 +46,13 @@ void HTMLButtonElement::setType(const AtomicString& type) {
   setAttribute(html_names::kTypeAttr, type);
 }
 
+bool HTMLButtonElement::TypeShouldForceLegacyLayout() const {
+  if (RuntimeEnabledFeatures::LayoutNGForControlsEnabled())
+    return false;
+  UseCounter::Count(GetDocument(), WebFeature::kLegacyLayoutByButton);
+  return true;
+}
+
 LayoutObject* HTMLButtonElement::CreateLayoutObject(const ComputedStyle& style,
                                                     LegacyLayout legacy) {
   // https://html.spec.whatwg.org/C/#button-layout

third_party/blink/renderer/core/html/forms/html_button_element.h

@@ -60,6 +60,7 @@ class HTMLButtonElement final : public HTMLFormControlElement {
 
   bool IsEnumeratable() const override { return true; }
   bool IsLabelable() const override { return true; }
+  bool TypeShouldForceLegacyLayout() const final;
   bool IsInteractiveContent() const override;
   bool MatchesDefaultPseudoClass() const override;
 

tools/metrics/histograms/enums.xml

@@ -28544,7 +28544,7 @@ Called by update_use_counter_feature_enum.py.-->
   <int value="3201" label="OBSOLETE_WrongBaselineOfButtonElement"/>
   <int value="3202" label="V8Document_HasTrustToken_Method"/>
   <int value="3203" label="ForceLoadAtTop"/>
-  <int value="3204" label="OBSOLETE_LegacyLayoutByButton"/>
+  <int value="3204" label="LegacyLayoutByButton"/>
   <int value="3205" label="LegacyLayoutByDeprecatedFlexBox"/>
   <int value="3206" label="LegacyLayoutByDetailsMarker"/>
   <int value="3207" label="LegacyLayoutByEditing"/>