Enable HTMLImageElement to avoid immediate src loading when parsed

Source/core/dom/Element.cpp

Index: Source/core/dom/Element.cpp
diff --git a/Source/core/dom/Element.cpp b/Source/core/dom/Element.cpp
index 14e2950fba9559fadd97d5d4c6508511f4520f7f..832a65fb30d66113858c7e539ba4cefd359a8e65 100644
--- a/Source/core/dom/Element.cpp
+++ b/Source/core/dom/Element.cpp
@@ -916,6 +916,8 @@ void Element::setSynchronizedLazyAttribute(const QualifiedName& name, const Atom
 
 ALWAYS_INLINE void Element::setAttributeInternal(size_t index, const QualifiedName& name, const AtomicString& newValue, SynchronizationOfLazyAttribute inSynchronizationOfLazyAttribute)
 {
+    m_parserSet = false;
+
     if (newValue.isNull()) {
         if (index != kNotFound)
             removeAttributeInternal(index, inSynchronizationOfLazyAttribute);
@@ -1198,6 +1200,8 @@ void Element::parserSetAttributes(const Vector<Attribute>& attributeVector)
     else
         m_elementData = ShareableElementData::createWithAttributes(attributeVector);
 
+    m_parserSet = true;
+
     // Use attributeVector instead of m_elementData because attributeChanged might modify m_elementData.
     for (unsigned i = 0; i < attributeVector.size(); ++i)
         attributeChangedFromParserOrByCloning(attributeVector[i].name(), attributeVector[i].value(), ModifiedDirectly);
@@ -2095,6 +2099,8 @@ void Element::removeAttributeInternal(size_t index, SynchronizationOfLazyAttribu
 {
     ASSERT_WITH_SECURITY_IMPLICATION(index < attributeCount());
 
+    m_parserSet = false;
+
     UniqueElementData* elementData = ensureUniqueElementData();
 
     QualifiedName name = elementData->attributeItem(index)->name();
@@ -2116,6 +2122,8 @@ void Element::removeAttributeInternal(size_t index, SynchronizationOfLazyAttribu
 
 void Element::addAttributeInternal(const QualifiedName& name, const AtomicString& value, SynchronizationOfLazyAttribute inSynchronizationOfLazyAttribute)
 {
+    m_parserSet = false;
+
     if (!inSynchronizationOfLazyAttribute)
         willModifyAttribute(name, nullAtom, value);
     ensureUniqueElementData()->addAttribute(name, value);