Do not block painting for in-body CSS

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

Index: third_party/WebKit/Source/core/html/HTMLLinkElement.cpp
diff --git a/third_party/WebKit/Source/core/html/HTMLLinkElement.cpp b/third_party/WebKit/Source/core/html/HTMLLinkElement.cpp
index 1b3522c8253f293e26488f4f24af88eb155cfbf4..e14947e1e14d2aec02625d1e0dcd069e8f13f5d1 100644
--- a/third_party/WebKit/Source/core/html/HTMLLinkElement.cpp
+++ b/third_party/WebKit/Source/core/html/HTMLLinkElement.cpp
@@ -481,6 +481,7 @@ LinkStyle::LinkStyle(HTMLLinkElement* owner)
     , m_firedLoad(false)
     , m_loadedSheet(false)
     , m_fetchFollowingCORS(false)
+    , m_beforeBody(false)
 {
 }
 
@@ -622,7 +623,8 @@ void LinkStyle::addPendingSheet(PendingSheetType type)
 
     if (m_pendingSheetType == NonBlocking)
         return;
-    m_owner->document().styleEngine().addPendingSheet();
+    m_beforeBody = m_beforeBody || !m_owner->document().body();
+    m_owner->document().styleEngine().addPendingSheet(m_beforeBody);
 }
 
 void LinkStyle::removePendingSheet()
@@ -638,7 +640,7 @@ void LinkStyle::removePendingSheet()
         return;
     }
 
-    m_owner->document().styleEngine().removePendingSheet(m_owner);
+    m_owner->document().styleEngine().removePendingSheet(m_owner, m_beforeBody);
 }
 
 void LinkStyle::setDisabledState(bool disabled)