Set ComputedStyle on Node and use that in buildOwnLayout()

third_party/WebKit/Source/core/html/HTMLVideoElement.cpp

Index: third_party/WebKit/Source/core/html/HTMLVideoElement.cpp
diff --git a/third_party/WebKit/Source/core/html/HTMLVideoElement.cpp b/third_party/WebKit/Source/core/html/HTMLVideoElement.cpp
index 04ae3c0f4c4b88d04dc13ea5d87e69732cfcd376..7a0313fae719bef765ae9769aa784621adb834e7 100644
--- a/third_party/WebKit/Source/core/html/HTMLVideoElement.cpp
+++ b/third_party/WebKit/Source/core/html/HTMLVideoElement.cpp
@@ -92,7 +92,7 @@ void HTMLVideoElement::attach(const AttachContext& context)
         if (!m_imageLoader)
             m_imageLoader = HTMLImageLoader::create(this);
         m_imageLoader->updateFromElement();
-        if (layoutObject())
+        if (hasLayoutObject())
             toLayoutImage(layoutObject())->imageResource()->setImageResource(m_imageLoader->image());
     }
 }
@@ -129,7 +129,7 @@ void HTMLVideoElement::parseAttribute(const QualifiedName& name, const AtomicStr
                 m_imageLoader = HTMLImageLoader::create(this);
             m_imageLoader->updateFromElement(ImageLoader::UpdateIgnorePreviousError);
         } else {
-            if (layoutObject())
+            if (hasLayoutObject())
                 toLayoutImage(layoutObject())->imageResource()->setImageResource(0);
         }
         // Notify the player when the poster image URL changes.