Introduce EditingStyleUtilities.{cpp,h}

third_party/WebKit/Source/core/editing/EditingStyle.h

Index: third_party/WebKit/Source/core/editing/EditingStyle.h
diff --git a/third_party/WebKit/Source/core/editing/EditingStyle.h b/third_party/WebKit/Source/core/editing/EditingStyle.h
index 336512a5713ab078684505d627b8a449ebb547c3..46539606c1a4a25dbee8cf77213555d0f5543ff3 100644
--- a/third_party/WebKit/Source/core/editing/EditingStyle.h
+++ b/third_party/WebKit/Source/core/editing/EditingStyle.h
@@ -148,9 +148,9 @@ class CORE_EXPORT EditingStyle final : public GarbageCollected<EditingStyle> {
   void mergeInlineStyleOfElement(HTMLElement*,
                                  CSSPropertyOverrideMode,
                                  PropertiesToInclude = AllProperties);
-  static EditingStyle* wrappingStyleForAnnotatedSerialization(
-      ContainerNode* context);
-  static EditingStyle* wrappingStyleForSerialization(ContainerNode* context);
+  void mergeInlineAndImplicitStyleOfElement(Element*,
+                                            CSSPropertyOverrideMode,
+                                            PropertiesToInclude);
   void mergeStyleFromRules(Element*);
   void mergeStyleFromRulesForSerialization(Element*);
   void removeStyleFromRulesAndContext(Element*, ContainerNode* context);
@@ -161,19 +161,7 @@ class CORE_EXPORT EditingStyle final : public GarbageCollected<EditingStyle> {
 
   float fontSizeDelta() const { return m_fontSizeDelta; }
   bool hasFontSizeDelta() const { return m_fontSizeDelta != NoFontDelta; }
-
-  static EditingStyle* styleAtSelectionStart(
-      const VisibleSelection&,
-      bool shouldUseBackgroundColorInEffect = false,
-      MutableStylePropertySet* styleToCheck = nullptr);
-  static WritingDirection textDirectionForSelection(
-      const VisibleSelection&,
-      EditingStyle* typingStyle,
-      bool& hasNestedOrMultipleEmbeddings);
-  static bool isEmbedOrIsolate(CSSValueID unicodeBidi) {
-    return unicodeBidi == CSSValueIsolate ||
-           unicodeBidi == CSSValueWebkitIsolate || unicodeBidi == CSSValueEmbed;
-  }
+  void setProperty(CSSPropertyID, const String& value, bool important = false);
 
   DECLARE_TRACE();
 
@@ -185,7 +173,7 @@ class CORE_EXPORT EditingStyle final : public GarbageCollected<EditingStyle> {
   EditingStyle(CSSPropertyID, const String& value);
   void init(Node*, PropertiesToInclude);
   void removeInheritedColorsIfNeeded(const ComputedStyle*);
-  void setProperty(CSSPropertyID, const String& value, bool important = false);
+
   void replaceFontSizeByKeywordIfPossible(const ComputedStyle*,
                                           CSSComputedStyleDeclaration*);
   void extractFontSizeDelta();
@@ -195,9 +183,6 @@ class CORE_EXPORT EditingStyle final : public GarbageCollected<EditingStyle> {
       HTMLElement*,
       EditingStyle* extractedStyle,
       Vector<CSSPropertyID>* conflictingProperties) const;
-  void mergeInlineAndImplicitStyleOfElement(Element*,
-                                            CSSPropertyOverrideMode,
-                                            PropertiesToInclude);
   void mergeStyle(const StylePropertySet*, CSSPropertyOverrideMode);
 
   Member<MutableStylePropertySet> m_mutableStyle;