Manual revert of "Preload scan external css for @import"

third_party/WebKit/Source/core/fetch/CSSStyleSheetResource.cpp

Index: third_party/WebKit/Source/core/fetch/CSSStyleSheetResource.cpp
diff --git a/third_party/WebKit/Source/core/fetch/CSSStyleSheetResource.cpp b/third_party/WebKit/Source/core/fetch/CSSStyleSheetResource.cpp
index 78ebcd9928613cb4efdb798cef7753d0910e510b..8aa33d13f76e3b233933654410925106089ba313 100644
--- a/third_party/WebKit/Source/core/fetch/CSSStyleSheetResource.cpp
+++ b/third_party/WebKit/Source/core/fetch/CSSStyleSheetResource.cpp
@@ -51,7 +51,6 @@ CSSStyleSheetResource* CSSStyleSheetResource::createForTest(const ResourceReques
 
 CSSStyleSheetResource::CSSStyleSheetResource(const ResourceRequest& resourceRequest, const ResourceLoaderOptions& options, const String& charset)
     : StyleSheetResource(resourceRequest, CSSStyleSheet, options, "text/css", charset)
-    , m_didNotifyFirstData(false)
 {
 }
 
@@ -99,17 +98,6 @@ const String CSSStyleSheetResource::sheetText(MIMETypeCheck mimeTypeCheck) const
     return decodedText();
 }
 
-void CSSStyleSheetResource::appendData(const char* data, size_t length)
-{
-    Resource::appendData(data, length);
-    if (m_didNotifyFirstData)
-        return;
-    ResourceClientWalker<StyleSheetResourceClient> w(m_clients);
-    while (StyleSheetResourceClient* c = w.next())
-        c->didAppendFirstData(this);
-    m_didNotifyFirstData = true;
-}
-
 void CSSStyleSheetResource::checkNotify()
 {
     // Decode the data to find out the encoding and keep the sheet text around during checkNotify()