INPUT element: Updating 'step' attribute should adjust the last value.

third_party/WebKit/Source/core/html/HTMLInputElement.h

Index: third_party/WebKit/Source/core/html/HTMLInputElement.h
diff --git a/third_party/WebKit/Source/core/html/HTMLInputElement.h b/third_party/WebKit/Source/core/html/HTMLInputElement.h
index 4fc8a7d0bdce93b4654d2fcb47c70c35d2775943..c3d655425b5a5ce9a66824e500916f82640af754 100644
--- a/third_party/WebKit/Source/core/html/HTMLInputElement.h
+++ b/third_party/WebKit/Source/core/html/HTMLInputElement.h
@@ -125,6 +125,8 @@ class CORE_EXPORT HTMLInputElement : public HTMLTextFormControlElement {
   void setValue(const String&,
                 TextFieldEventBehavior = DispatchNoEvent) override;
   void setValueForUser(const String&);
+  // Update the value, and clear hasDirtyValue() flag.
+  void setNonDirtyValue(const String&);
   // Checks if the specified string would be a valid value.
   // We should not call this for types with no string value such as CHECKBOX and
   // RADIO.
@@ -405,8 +407,8 @@ class CORE_EXPORT HTMLInputElement : public HTMLTextFormControlElement {
   bool shouldDispatchFormControlChangeEvent(String&, String&) override;
 
   AtomicString m_name;
-  // A dirty value.  isNull() means the value is not dirty and we should refer
-  // to |value| content attribute value.
+  // The value string in |value| value mode.
+  // TODO(tkent): Rename it to m_nonAttributeValue.
   String m_valueIfDirty;
   String m_suggestedValue;
   int m_size;