Remove iframe@seamless

Source/core/css/resolver/StyleResolver.cpp

Index: Source/core/css/resolver/StyleResolver.cpp
diff --git a/Source/core/css/resolver/StyleResolver.cpp b/Source/core/css/resolver/StyleResolver.cpp
index eeaac0a9ae34a938d36d89f7e57ee922f0f1d550..318b47d4447f3fad0bb0ab3393ebecaa73b9451d 100644
--- a/Source/core/css/resolver/StyleResolver.cpp
+++ b/Source/core/css/resolver/StyleResolver.cpp
@@ -583,25 +583,12 @@ PassRefPtr<RenderStyle> StyleResolver::styleForDocument(Document& document, CSSF
 {
     const Frame* frame = document.frame();
 
-    // HTML5 states that seamless iframes should replace default CSS values
-    // with values inherited from the containing iframe element. However,
-    // some values (such as the case of designMode = "on") still need to
-    // be set by this "document style".
     RefPtr<RenderStyle> documentStyle = RenderStyle::create();
-    bool seamlessWithParent = document.shouldDisplaySeamlesslyWithParent();
-    if (seamlessWithParent) {
-        RenderStyle* iframeStyle = document.seamlessParentIFrame()->renderStyle();
-        if (iframeStyle)
-            documentStyle->inheritFrom(iframeStyle);
-    }
-
-    // FIXME: It's not clear which values below we want to override in the seamless case!
     documentStyle->setDisplay(BLOCK);
-    if (!seamlessWithParent) {
-        documentStyle->setRTLOrdering(document.visuallyOrdered() ? VisualOrder : LogicalOrder);
-        documentStyle->setZoom(frame && !document.printing() ? frame->pageZoomFactor() : 1);
-        documentStyle->setLocale(document.contentLanguage());
-    }
+    documentStyle->setRTLOrdering(document.visuallyOrdered() ? VisualOrder : LogicalOrder);
+    documentStyle->setZoom(frame && !document.printing() ? frame->pageZoomFactor() : 1);
+    documentStyle->setLocale(document.contentLanguage());
+
     // This overrides any -webkit-user-modify inherited from the parent iframe.
     documentStyle->setUserModify(document.inDesignMode() ? READ_WRITE : READ_ONLY);