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

Source/core/html/HTMLInputElement.cpp

Index: Source/core/html/HTMLInputElement.cpp
diff --git a/Source/core/html/HTMLInputElement.cpp b/Source/core/html/HTMLInputElement.cpp
index 7952c58f83be743b8803e9610ed433ab59f45558..57ace97980b52e2793d98996333dfad5d796c927 100644
--- a/Source/core/html/HTMLInputElement.cpp
+++ b/Source/core/html/HTMLInputElement.cpp
@@ -68,6 +68,7 @@
 #include "core/html/shadow/ShadowElementNames.h"
 #include "core/page/Chrome.h"
 #include "core/page/ChromeClient.h"
+#include "core/page/Page.h"
 #include "core/rendering/RenderTextControlSingleLine.h"
 #include "core/rendering/RenderTheme.h"
 #include "platform/DateTimeChooser.h"
@@ -918,6 +919,12 @@ void HTMLInputElement::copyNonAttributePropertiesFromElement(const Element& sour
 
 String HTMLInputElement::value() const
 {
+    if (m_inputType->canSetValueAfterUserGesture() && !m_valueGatedOnUserGesture.isEmpty()) {
+        if (document().page()->userGestureSeenSinceLastNavigation())
+            return m_valueGatedOnUserGesture;
+        return String();
+    }
+
     String value;
     if (m_inputType->getTypeSpecificValue(value))
         return value;
@@ -949,6 +956,14 @@ void HTMLInputElement::setValueForUser(const String& value)
     setValue(value, DispatchChangeEvent);
 }
 
+void HTMLInputElement::setValueAfterUserGesture(const String& value)
+{
+    if (m_inputType->canSetValueAfterUserGesture())
+        m_valueGatedOnUserGesture = value;
+    else
+        setValueForUser(value);
+}
+
 const String& HTMLInputElement::suggestedValue() const
 {
     return m_suggestedValue;
@@ -1022,6 +1037,7 @@ void HTMLInputElement::setValue(const String& value, TextFieldEventBehavior even
 
 void HTMLInputElement::setValueInternal(const String& sanitizedValue, TextFieldEventBehavior eventBehavior)
 {
+    m_valueGatedOnUserGesture = String();
     m_valueIfDirty = sanitizedValue;
     setNeedsValidityCheck();
     if (document().focusedElement() == this)