Make calls to AtomicString(const String&) explicit in html/

Source/core/html/shadow/DateTimeFieldElement.cpp

Index: Source/core/html/shadow/DateTimeFieldElement.cpp
diff --git a/Source/core/html/shadow/DateTimeFieldElement.cpp b/Source/core/html/shadow/DateTimeFieldElement.cpp
index 04289801fb60309e184e7a512af4e8c0ce54eb29..fd10cad7ee78269ee2e6bf3a7c07fe2332191773 100644
--- a/Source/core/html/shadow/DateTimeFieldElement.cpp
+++ b/Source/core/html/shadow/DateTimeFieldElement.cpp
@@ -152,11 +152,11 @@ void DateTimeFieldElement::initialize(const AtomicString& pseudo, const String&
 {
     // On accessibility, DateTimeFieldElement acts like spin button.
     setAttribute(roleAttr, AtomicString("spinbutton", AtomicString::ConstructFromLiteral));
-    setAttribute(aria_valuetextAttr, emptyValueAXText());
-    setAttribute(aria_valueminAttr, String::number(axMinimum));
-    setAttribute(aria_valuemaxAttr, String::number(axMaximum));
+    setAttribute(aria_valuetextAttr, AtomicString(emptyValueAXText()));
+    setAttribute(aria_valueminAttr, AtomicString::number(axMinimum));
+    setAttribute(aria_valuemaxAttr, AtomicString::number(axMaximum));
 
-    setAttribute(aria_helpAttr, axHelpText);
+    setAttribute(aria_helpAttr, AtomicString(axHelpText));
     setShadowPseudoId(pseudo);
     appendChild(Text::create(document(), visibleValue()));
 }
@@ -220,10 +220,10 @@ void DateTimeFieldElement::updateVisibleValue(EventBehavior eventBehavior)
 
     textNode->replaceWholeText(newVisibleValue);
     if (hasValue()) {
-        setAttribute(aria_valuetextAttr, newVisibleValue);
-        setAttribute(aria_valuenowAttr, String::number(valueForARIAValueNow()));
+        setAttribute(aria_valuetextAttr, AtomicString(newVisibleValue));
+        setAttribute(aria_valuenowAttr, AtomicString::number(valueForARIAValueNow()));
     } else {
-        setAttribute(aria_valuetextAttr, emptyValueAXText());
+        setAttribute(aria_valuetextAttr, AtomicString(emptyValueAXText()));
         removeAttribute(aria_valuenowAttr);
     }