diff -r 000000000000 -r 6474c204b198 layout/style/nsHTMLCSSStyleSheet.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/layout/style/nsHTMLCSSStyleSheet.cpp	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,187 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/*
+ * style sheet and style rule processor representing style attributes
+ */
+
+#include "nsHTMLCSSStyleSheet.h"
+#include "mozilla/MemoryReporting.h"
+#include "mozilla/css/StyleRule.h"
+#include "nsIStyleRuleProcessor.h"
+#include "nsPresContext.h"
+#include "nsRuleWalker.h"
+#include "nsRuleProcessorData.h"
+#include "mozilla/dom/Element.h"
+#include "nsAttrValue.h"
+#include "nsAttrValueInlines.h"
+
+using namespace mozilla;
+using namespace mozilla::dom;
+
+namespace {
+
+PLDHashOperator
+ClearAttrCache(const nsAString& aKey, MiscContainer*& aValue, void*)
+{
+  // Ideally we'd just call MiscContainer::Evict, but we can't do that since
+  // we're iterating the hashtable.
+  MOZ_ASSERT(aValue->mType == nsAttrValue::eCSSStyleRule);
+
+  aValue->mValue.mCSSStyleRule->SetHTMLCSSStyleSheet(nullptr);
+  aValue->mValue.mCached = 0;
+
+  return PL_DHASH_REMOVE;
+}
+
+} // anonymous namespace
+
+nsHTMLCSSStyleSheet::nsHTMLCSSStyleSheet()
+{
+}
+
+nsHTMLCSSStyleSheet::~nsHTMLCSSStyleSheet()
+{
+  // We may go away before all of our cached style attributes do,
+  // so clean up any that are left.
+  mCachedStyleAttrs.Enumerate(ClearAttrCache, nullptr);
+}
+
+NS_IMPL_ISUPPORTS(nsHTMLCSSStyleSheet, nsIStyleRuleProcessor)
+
+/* virtual */ void
+nsHTMLCSSStyleSheet::RulesMatching(ElementRuleProcessorData* aData)
+{
+  Element* element = aData->mElement;
+
+  // just get the one and only style rule from the content's STYLE attribute
+  css::StyleRule* rule = element->GetInlineStyleRule();
+  if (rule) {
+    rule->RuleMatched();
+    aData->mRuleWalker->Forward(rule);
+  }
+
+  rule = element->GetSMILOverrideStyleRule();
+  if (rule) {
+    if (aData->mPresContext->IsProcessingRestyles() &&
+        !aData->mPresContext->IsProcessingAnimationStyleChange()) {
+      // Non-animation restyle -- don't process SMIL override style, because we
+      // don't want SMIL animation to trigger new CSS transitions. Instead,
+      // request an Animation restyle, so we still get noticed.
+      aData->mPresContext->PresShell()->RestyleForAnimation(element,
+                                                            eRestyle_Self);
+    } else {
+      // Animation restyle (or non-restyle traversal of rules)
+      // Now we can walk SMIL overrride style, without triggering transitions.
+      rule->RuleMatched();
+      aData->mRuleWalker->Forward(rule);
+    }
+  }
+}
+
+/* virtual */ void
+nsHTMLCSSStyleSheet::RulesMatching(PseudoElementRuleProcessorData* aData)
+{
+  if (nsCSSPseudoElements::PseudoElementSupportsStyleAttribute(aData->mPseudoType)) {
+    MOZ_ASSERT(aData->mPseudoElement,
+        "If pseudo element is supposed to support style attribute, it must "
+        "have a pseudo element set");
+
+    // just get the one and only style rule from the content's STYLE attribute
+    css::StyleRule* rule = aData->mPseudoElement->GetInlineStyleRule();
+    if (rule) {
+      rule->RuleMatched();
+      aData->mRuleWalker->Forward(rule);
+    }
+  }
+}
+
+/* virtual */ void
+nsHTMLCSSStyleSheet::RulesMatching(AnonBoxRuleProcessorData* aData)
+{
+}
+
+#ifdef MOZ_XUL
+/* virtual */ void
+nsHTMLCSSStyleSheet::RulesMatching(XULTreeRuleProcessorData* aData)
+{
+}
+#endif
+
+// Test if style is dependent on content state
+/* virtual */ nsRestyleHint
+nsHTMLCSSStyleSheet::HasStateDependentStyle(StateRuleProcessorData* aData)
+{
+  return nsRestyleHint(0);
+}
+
+/* virtual */ nsRestyleHint
+nsHTMLCSSStyleSheet::HasStateDependentStyle(PseudoElementStateRuleProcessorData* aData)
+{
+  return nsRestyleHint(0);
+}
+
+/* virtual */ bool
+nsHTMLCSSStyleSheet::HasDocumentStateDependentStyle(StateRuleProcessorData* aData)
+{
+  return false;
+}
+
+// Test if style is dependent on attribute
+/* virtual */ nsRestyleHint
+nsHTMLCSSStyleSheet::HasAttributeDependentStyle(AttributeRuleProcessorData* aData)
+{
+  // Perhaps should check that it's XUL, SVG, (or HTML) namespace, but
+  // it doesn't really matter.
+  if (aData->mAttrHasChanged && aData->mAttribute == nsGkAtoms::style) {
+    return eRestyle_Self;
+  }
+
+  return nsRestyleHint(0);
+}
+
+/* virtual */ bool
+nsHTMLCSSStyleSheet::MediumFeaturesChanged(nsPresContext* aPresContext)
+{
+  return false;
+}
+
+/* virtual */ size_t
+nsHTMLCSSStyleSheet::SizeOfExcludingThis(mozilla::MallocSizeOf aMallocSizeOf) const
+{
+  return 0;
+}
+
+/* virtual */ size_t
+nsHTMLCSSStyleSheet::SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const
+{
+  return aMallocSizeOf(this) + SizeOfExcludingThis(aMallocSizeOf);
+}
+
+void
+nsHTMLCSSStyleSheet::CacheStyleAttr(const nsAString& aSerialized,
+                                    MiscContainer* aValue)
+{
+  mCachedStyleAttrs.Put(aSerialized, aValue);
+}
+
+void
+nsHTMLCSSStyleSheet::EvictStyleAttr(const nsAString& aSerialized,
+                                    MiscContainer* aValue)
+{
+#ifdef DEBUG
+  {
+    NS_ASSERTION(aValue = mCachedStyleAttrs.Get(aSerialized),
+                 "Cached value does not match?!");
+  }
+#endif
+  mCachedStyleAttrs.Remove(aSerialized);
+}
+
+MiscContainer*
+nsHTMLCSSStyleSheet::LookupStyleAttr(const nsAString& aSerialized)
+{
+  return mCachedStyleAttrs.Get(aSerialized);
+}