Revert of Make document.rootScroller into an origin trial

third_party/WebKit/Source/bindings/core/v8/ConditionalFeaturesForCore.cpp

 // Copyright 2017 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 "bindings/core/v8/ConditionalFeaturesForCore.h"
 
 #include "bindings/core/v8/ConditionalFeatures.h"
 #include "bindings/core/v8/ScriptState.h"
 #include "bindings/core/v8/V8Document.h"
 #include "bindings/core/v8/V8HTMLLinkElement.h"
@@ skipping 26 matching lines @@
   if (!executionContext)
     return;
   v8::Isolate* isolate = scriptState->isolate();
   const DOMWrapperWorld& world = scriptState->world();
   if (wrapperTypeInfo == &V8HTMLLinkElement::wrapperTypeInfo) {
     if (OriginTrials::linkServiceWorkerEnabled(executionContext)) {
       V8HTMLLinkElement::installLinkServiceWorker(
           isolate, world, v8::Local<v8::Object>(), prototypeObject,
           interfaceObject);
     }
-  } else if (wrapperTypeInfo == &V8Document::wrapperTypeInfo) {
-    if (OriginTrials::setRootScrollerEnabled(executionContext)) {
-      V8Document::installRootScroller(isolate, world, v8::Local<v8::Object>(),
-                                      prototypeObject, interfaceObject);
-    }
   }
 }
 
 void installPendingConditionalFeatureCore(const String& feature,
                                           const ScriptState* scriptState) {
   (*s_oldInstallPendingConditionalFeatureFunction)(feature, scriptState);
 
   // TODO(iclelland): Generate all of this logic at compile-time, based on the
   // configuration of origin trial enabled attributes and interfaces in IDL
   // files. (crbug.com/615060)
   v8::Local<v8::Object> prototypeObject;
   v8::Local<v8::Function> interfaceObject;
   v8::Isolate* isolate = scriptState->isolate();
   const DOMWrapperWorld& world = scriptState->world();
   V8PerContextData* contextData = scriptState->perContextData();
   if (feature == "ForeignFetch") {
     if (contextData->getExistingConstructorAndPrototypeForType(
             &V8HTMLLinkElement::wrapperTypeInfo, &prototypeObject,
             &interfaceObject)) {
       V8HTMLLinkElement::installLinkServiceWorker(
           isolate, world, v8::Local<v8::Object>(), prototypeObject,
           interfaceObject);
     }
     return;
   }
-  if (feature == "RootScroller") {
-    if (contextData->getExistingConstructorAndPrototypeForType(
-            &V8Document::wrapperTypeInfo, &prototypeObject, &interfaceObject)) {
-      V8Document::installRootScroller(isolate, world, v8::Local<v8::Object>(),
-                                      prototypeObject, interfaceObject);
-    }
-    return;
-  }
 }
 
 void installConditionalFeaturesOnWindow(const ScriptState* scriptState) {
   DCHECK(scriptState);
   DCHECK(scriptState->context() == scriptState->isolate()->GetCurrentContext());
   DCHECK(scriptState->perContextData());
   DCHECK(scriptState->world().isMainWorld());
   installConditionalFeatures(&V8Window::wrapperTypeInfo, scriptState,
                              v8::Local<v8::Object>(),
                              v8::Local<v8::Function>());
@@ skipping 19 matching lines @@
 
 void registerInstallConditionalFeaturesForCore() {
   s_oldInstallConditionalFeaturesFunction =
       setInstallConditionalFeaturesFunction(&installConditionalFeaturesCore);
   s_oldInstallPendingConditionalFeatureFunction =
       setInstallPendingConditionalFeatureFunction(
           &installPendingConditionalFeatureCore);
 }
 
 }  // namespace blink