Remove <video> width and height attributes from intrisic size logic

Source/core/rendering/RenderVideo.cpp

Index: Source/core/rendering/RenderVideo.cpp
diff --git a/Source/core/rendering/RenderVideo.cpp b/Source/core/rendering/RenderVideo.cpp
index fb198bd51e6e0eb3ea1d86d6fa35eb22b272a329..a7bd7be990703545ff93d238eee8d94ef3981d55 100644
--- a/Source/core/rendering/RenderVideo.cpp
+++ b/Source/core/rendering/RenderVideo.cpp
@@ -107,12 +107,6 @@ LayoutSize RenderVideo::calculateIntrinsicSize()
     if (video->shouldDisplayPosterImage() && !m_cachedImageSize.isEmpty() && !imageResource()->errorOccurred())
         return m_cachedImageSize;
 
-    // When the natural size of the video is unavailable, we use the provided
-    // width and height attributes of the video element as the intrinsic size until
-    // better values become available.
-    if (video->hasAttribute(widthAttr) && video->hasAttribute(heightAttr))
-        return LayoutSize(video->width(), video->height());
-
     // <video> in standalone media documents should not use the default 300x150
     // size since they also have audio-only files. By setting the intrinsic
     // size to 300x1 the video will resize itself in these cases, and audio will