Add support for setting password value gated on user's gesture in a page

Source/core/html/HTMLInputElement.h

Index: Source/core/html/HTMLInputElement.h
diff --git a/Source/core/html/HTMLInputElement.h b/Source/core/html/HTMLInputElement.h
index af27a9223b1e0e62a9bdabe864a5ea7cd5d732f3..c9d909dd92ccdab49705e26bb4921322b89ba0c2 100644
--- a/Source/core/html/HTMLInputElement.h
+++ b/Source/core/html/HTMLInputElement.h
@@ -137,6 +137,7 @@ public:
     void setValue(const String&, ExceptionState&, TextFieldEventBehavior = DispatchNoEvent);
     void setValue(const String&, TextFieldEventBehavior = DispatchNoEvent);
     void setValueForUser(const String&);
+    void setValueAfterUserGesture(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.
     bool isValidValue(const String&) const;
@@ -379,6 +380,7 @@ private:
     AtomicString m_name;
     String m_valueIfDirty;
     String m_suggestedValue;
+    String m_valueGatedOnUserGesture;
     int m_size;
     int m_maxLength;
     short m_maxResults;