Remove ENABLE_CUSTOM_ELEMENTS compile time flag

Source/WebKit/chromium/src/WebRuntimeFeatures.cpp

Index: Source/WebKit/chromium/src/WebRuntimeFeatures.cpp
diff --git a/Source/WebKit/chromium/src/WebRuntimeFeatures.cpp b/Source/WebKit/chromium/src/WebRuntimeFeatures.cpp
index d229d371990e89fd2fd960a3fd7757c7839f3bb8..8c6f07a9061edac61c931f414b6c935ffc5d531b 100644
--- a/Source/WebKit/chromium/src/WebRuntimeFeatures.cpp
+++ b/Source/WebKit/chromium/src/WebRuntimeFeatures.cpp
@@ -359,20 +359,12 @@ bool WebRuntimeFeatures::isExperimentalShadowDOMEnabled()
 
 void WebRuntimeFeatures::enableCustomDOMElements(bool enable)
 {
-#if ENABLE(CUSTOM_ELEMENTS)
     RuntimeEnabledFeatures::setCustomDOMElements(enable);
-#else
-    UNUSED_PARAM(enable);
-#endif
 }
 
 bool WebRuntimeFeatures::isCustomDOMElementsEnabled()
 {
-#if ENABLE(CUSTOM_ELEMENTS)
     return RuntimeEnabledFeatures::customDOMElementsEnabled();
-#else
-    return false;
-#endif
 }