Rename ExperimentalShadowDOM runtime feature to ShadowDOM.

Source/core/testing/InternalSettings.cpp

Index: Source/core/testing/InternalSettings.cpp
diff --git a/Source/core/testing/InternalSettings.cpp b/Source/core/testing/InternalSettings.cpp
index f847a0d8f2449fab8db1a7f4cb86ebaaae59daf0..4d213d127915e36185ec21d85a04589dc54af5a0 100644
--- a/Source/core/testing/InternalSettings.cpp
+++ b/Source/core/testing/InternalSettings.cpp
@@ -58,7 +58,6 @@ namespace WebCore {
 InternalSettings::Backup::Backup(Settings* settings)
     : m_originalCSSExclusionsEnabled(RuntimeEnabledFeatures::cssExclusionsEnabled())
     , m_originalAuthorShadowDOMForAnyElementEnabled(RuntimeEnabledFeatures::authorShadowDOMForAnyElementEnabled())
-    , m_originalExperimentalShadowDOMEnabled(RuntimeEnabledFeatures::experimentalShadowDOMEnabled())
     , m_originalExperimentalWebSocketEnabled(settings->experimentalWebSocketEnabled())
     , m_originalStyleScoped(RuntimeEnabledFeatures::styleScopedEnabled())
     , m_originalEditingBehavior(settings->editingBehaviorType())
@@ -81,7 +80,6 @@ void InternalSettings::Backup::restoreTo(Settings* settings)
 {
     RuntimeEnabledFeatures::setCSSExclusionsEnabled(m_originalCSSExclusionsEnabled);
     RuntimeEnabledFeatures::setAuthorShadowDOMForAnyElementEnabled(m_originalAuthorShadowDOMForAnyElementEnabled);
-    RuntimeEnabledFeatures::setExperimentalShadowDOMEnabled(m_originalExperimentalShadowDOMEnabled);
     settings->setExperimentalWebSocketEnabled(m_originalExperimentalWebSocketEnabled);
     RuntimeEnabledFeatures::setStyleScopedEnabled(m_originalStyleScoped);
     settings->setEditingBehaviorType(m_originalEditingBehavior);
@@ -167,11 +165,6 @@ void InternalSettings::setAuthorShadowDOMForAnyElementEnabled(bool isEnabled)
     RuntimeEnabledFeatures::setAuthorShadowDOMForAnyElementEnabled(isEnabled);
 }
 
-void InternalSettings::setExperimentalShadowDOMEnabled(bool isEnabled)
-{
-    RuntimeEnabledFeatures::setExperimentalShadowDOMEnabled(isEnabled);
-}
-
 void InternalSettings::setExperimentalWebSocketEnabled(bool isEnabled)
 {
     settings()->setExperimentalWebSocketEnabled(isEnabled);