Ensure we never remove the style attribute when syncing it from CSSOM.

third_party/WebKit/Source/core/dom/Element.cpp

Index: third_party/WebKit/Source/core/dom/Element.cpp
diff --git a/third_party/WebKit/Source/core/dom/Element.cpp b/third_party/WebKit/Source/core/dom/Element.cpp
index 4048627057cfba89fd7ef6947df9c88e11af6486..3bceecac1b52ec5aa21306653c0493a794524ed7 100644
--- a/third_party/WebKit/Source/core/dom/Element.cpp
+++ b/third_party/WebKit/Source/core/dom/Element.cpp
@@ -4016,7 +4016,7 @@ void Element::SynchronizeStyleAttributeInternal() const {
   const StylePropertySet* inline_style = this->InlineStyle();
   const_cast<Element*>(this)->SetSynchronizedLazyAttribute(
       styleAttr,
-      inline_style ? AtomicString(inline_style->AsText()) : g_null_atom);
+      inline_style ? AtomicString(inline_style->AsText()) : g_empty_atom);
 }
 
 CSSStyleDeclaration* Element::style() {