Merge StyleSheet into CSSStyleSheet.

sky/engine/core/css/CSSStyleSheet.cpp

 /*
  * (C) 1999-2003 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2004, 2006, 2007, 2012 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Library General Public License for more details.
  *
  * You should have received a copy of the GNU Library General Public License
  * along with this library; see the file COPYING.LIB.  If not, write to
  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  */
 
 #include "sky/engine/config.h"
 #include "sky/engine/core/css/CSSStyleSheet.h"
 
-#include "sky/engine/bindings/core/v8/ExceptionState.h"
-#include "sky/engine/bindings/core/v8/V8Binding.h"
-#include "sky/engine/bindings/core/v8/V8PerIsolateData.h"
 #include "sky/engine/core/css/MediaList.h"
-#include "sky/engine/core/css/StyleRule.h"
 #include "sky/engine/core/css/StyleSheetContents.h"
-#include "sky/engine/core/css/parser/BisonCSSParser.h"
 #include "sky/engine/core/dom/Document.h"
-#include "sky/engine/core/dom/ExceptionCode.h"
 #include "sky/engine/core/dom/Node.h"
-#include "sky/engine/core/frame/UseCounter.h"
 #include "sky/engine/core/html/HTMLStyleElement.h"
-#include "sky/engine/wtf/text/StringBuilder.h"
 
 namespace blink {
 
 #if ENABLE(ASSERT)
 static bool isAcceptableCSSStyleSheetParent(Node* parentNode)
 {
     // Only these nodes can be parents of StyleSheets, and they need to call
     // clearOwnerNode() when moved out of document.
     // Destruction of the style sheet counts as being "moved out of the
     // document", but only in the non-oilpan version of blink. I.e. don't call
@@ skipping 34 matching lines @@
 {
     ASSERT(isAcceptableCSSStyleSheetParent(ownerNode));
     m_contents->registerClient(this);
 }
 
 CSSStyleSheet::~CSSStyleSheet()
 {
     m_contents->unregisterClient(this);
 }
 
-void CSSStyleSheet::willMutateRules()
-{
-    // If we are the only client it is safe to mutate.
-    if (m_contents->clientSize() <= 1 && !m_contents->isInMemoryCache()) {
-        m_contents->clearRuleSet();
-        if (Document* document = ownerDocument())
-            m_contents->removeSheetFromCache(document);
-        m_contents->setMutable();
-        return;
-    }
-    // Only cacheable stylesheets should have multiple clients.
-    ASSERT(m_contents->isCacheable());
-
-    // Copy-on-write.
-    m_contents->unregisterClient(this);
-    m_contents = m_contents->copy();
-    m_contents->registerClient(this);
-
-    m_contents->setMutable();
-}
-
-void CSSStyleSheet::didMutateRules()
-{
-    ASSERT(m_contents->isMutable());
-    ASSERT(m_contents->clientSize() <= 1);
-
-    didMutate(PartialRuleUpdate);
-}
-
-void CSSStyleSheet::didMutate(StyleSheetUpdateType updateType)
-{
-    Document* owner = ownerDocument();
-    if (!owner)
-        return;
-
-    owner->modifiedStyleSheet(this);
-}
-
-
 void CSSStyleSheet::setMediaQueries(PassRefPtr<MediaQuerySet> mediaQueries)
 {
     m_mediaQueries = mediaQueries;
 
     // Add warning message to inspector whenever dpi/dpcm values are used for "screen" media.
     reportMediaQueryWarningIfNeeded(ownerDocument(), m_mediaQueries.get());
 }
 
 unsigned CSSStyleSheet::length() const
 {
     return m_contents->ruleCount();
 }
 
 void CSSStyleSheet::clearOwnerNode()
 {
-    didMutate(EntireStyleSheetUpdate);
+    if (Document* owner = ownerDocument())
+        owner->modifiedStyleSheet(this);
     if (m_ownerNode)
         m_contents->unregisterClient(this);
     m_ownerNode = nullptr;
 }
 
 KURL CSSStyleSheet::baseURL() const
 {
     return m_contents->baseURL();
 }
 
 Document* CSSStyleSheet::ownerDocument() const
 {
     return ownerNode() ? &ownerNode()->document() : 0;
 }
 
 } // namespace blink