Introduce enum InputType::ValueMode.

third_party/WebKit/Source/core/html/forms/TextFieldInputType.cpp

Index: third_party/WebKit/Source/core/html/forms/TextFieldInputType.cpp
diff --git a/third_party/WebKit/Source/core/html/forms/TextFieldInputType.cpp b/third_party/WebKit/Source/core/html/forms/TextFieldInputType.cpp
index 0dda4f82e336e0b13d6aeb5a6f0300441fd2c417..410a938a5bad3b798164b19c5e31607cfeae8d20 100644
--- a/third_party/WebKit/Source/core/html/forms/TextFieldInputType.cpp
+++ b/third_party/WebKit/Source/core/html/forms/TextFieldInputType.cpp
@@ -120,6 +120,10 @@ InputTypeView* TextFieldInputType::createView() {
   return this;
 }
 
+InputType::ValueMode TextFieldInputType::valueMode() const {
+  return ValueMode::kValue;
+}
+
 SpinButtonElement* TextFieldInputType::spinButtonElement() const {
   return toSpinButtonElement(element().userAgentShadowRoot()->getElementById(
       ShadowElementNames::spinButton()));