Introduce enum InputType::ValueMode.

third_party/WebKit/Source/core/html/forms/InputType.h

Index: third_party/WebKit/Source/core/html/forms/InputType.h
diff --git a/third_party/WebKit/Source/core/html/forms/InputType.h b/third_party/WebKit/Source/core/html/forms/InputType.h
index 7b6e072bb4afdfcee9cf41ab8af5a2a06b62bf7f..54529a7ceeb9447c7df907ed5064e79b5320b8ba 100644
--- a/third_party/WebKit/Source/core/html/forms/InputType.h
+++ b/third_party/WebKit/Source/core/html/forms/InputType.h
@@ -95,6 +95,10 @@ class CORE_EXPORT InputType : public GarbageCollectedFinalized<InputType> {
   // is called.
   virtual String defaultValue() const;
 
+  // https://html.spec.whatwg.org/multipage/forms.html#dom-input-value
+  enum class ValueMode { kValue, kDefault, kDefaultOn, kFilename };
+  virtual ValueMode valueMode() const = 0;
+
   virtual double valueAsDate() const;
   virtual void setValueAsDate(double, ExceptionState&) const;
   virtual double valueAsDouble() const;
@@ -176,7 +180,6 @@ class CORE_EXPORT InputType : public GarbageCollectedFinalized<InputType> {
   virtual bool canSetSuggestedValue();
   virtual bool shouldSendChangeEventAfterCheckedChanged();
   virtual bool canSetValue(const String&);
-  virtual bool storesValueSeparateFromAttribute();
   virtual void setValue(const String&,
                         bool valueChanged,
                         TextFieldEventBehavior);