Move create() methods from StylePropertySet to MutableStylePropertySet.

Source/core/editing/EditorCommand.cpp

Index: Source/core/editing/EditorCommand.cpp
diff --git a/Source/core/editing/EditorCommand.cpp b/Source/core/editing/EditorCommand.cpp
index fb0de000a152442bb7faf51ad5e21d1bf6657c0f..c0572b436c934bc7f9e119cbb5da09b734f2c7a2 100644
--- a/Source/core/editing/EditorCommand.cpp
+++ b/Source/core/editing/EditorCommand.cpp
@@ -118,14 +118,14 @@ static bool applyCommandToFrame(Frame* frame, EditorCommandSource source, EditAc
 
 static bool executeApplyStyle(Frame* frame, EditorCommandSource source, EditAction action, CSSPropertyID propertyID, const String& propertyValue)
 {
-    RefPtr<StylePropertySet> style = StylePropertySet::create();
+    RefPtr<MutableStylePropertySet> style = MutableStylePropertySet::create();
     style->setProperty(propertyID, propertyValue);
     return applyCommandToFrame(frame, source, action, style.get());
 }
 
 static bool executeApplyStyle(Frame* frame, EditorCommandSource source, EditAction action, CSSPropertyID propertyID, int propertyValue)
 {
-    RefPtr<StylePropertySet> style = StylePropertySet::create();
+    RefPtr<MutableStylePropertySet> style = MutableStylePropertySet::create();
     style->setProperty(propertyID, propertyValue);
     return applyCommandToFrame(frame, source, action, style.get());
 }
@@ -152,7 +152,7 @@ static bool executeToggleStyleInList(Frame* frame, EditorCommandSource source, E
         newStyle = value->cssText();
 
     // FIXME: We shouldn't be having to convert new style into text.  We should have setPropertyCSSValue.
-    RefPtr<StylePropertySet> newMutableStyle = StylePropertySet::create();
+    RefPtr<MutableStylePropertySet> newMutableStyle = MutableStylePropertySet::create();
     newMutableStyle->setProperty(propertyID, newStyle);
     return applyCommandToFrame(frame, source, action, newMutableStyle.get());
 }
@@ -175,7 +175,7 @@ static bool executeToggleStyle(Frame* frame, EditorCommandSource source, EditAct
 
 static bool executeApplyParagraphStyle(Frame* frame, EditorCommandSource source, EditAction action, CSSPropertyID propertyID, const String& propertyValue)
 {
-    RefPtr<StylePropertySet> style = StylePropertySet::create();
+    RefPtr<MutableStylePropertySet> style = MutableStylePropertySet::create();
     style->setProperty(propertyID, propertyValue);
     // FIXME: We don't call shouldApplyStyle when the source is DOM; is there a good reason for that?
     switch (source) {
@@ -588,7 +588,7 @@ static bool executeJustifyRight(Frame* frame, Event*, EditorCommandSource source
 
 static bool executeMakeTextWritingDirectionLeftToRight(Frame* frame, Event*, EditorCommandSource, const String&)
 {
-    RefPtr<StylePropertySet> style = StylePropertySet::create();
+    RefPtr<MutableStylePropertySet> style = MutableStylePropertySet::create();
     style->setProperty(CSSPropertyUnicodeBidi, CSSValueEmbed);
     style->setProperty(CSSPropertyDirection, CSSValueLtr);
     frame->editor()->applyStyle(style.get(), EditActionSetWritingDirection);
@@ -597,7 +597,7 @@ static bool executeMakeTextWritingDirectionLeftToRight(Frame* frame, Event*, Edi
 
 static bool executeMakeTextWritingDirectionNatural(Frame* frame, Event*, EditorCommandSource, const String&)
 {
-    RefPtr<StylePropertySet> style = StylePropertySet::create();
+    RefPtr<MutableStylePropertySet> style = MutableStylePropertySet::create();
     style->setProperty(CSSPropertyUnicodeBidi, CSSValueNormal);
     frame->editor()->applyStyle(style.get(), EditActionSetWritingDirection);
     return true;
@@ -605,7 +605,7 @@ static bool executeMakeTextWritingDirectionNatural(Frame* frame, Event*, EditorC
 
 static bool executeMakeTextWritingDirectionRightToLeft(Frame* frame, Event*, EditorCommandSource, const String&)
 {
-    RefPtr<StylePropertySet> style = StylePropertySet::create();
+    RefPtr<MutableStylePropertySet> style = MutableStylePropertySet::create();
     style->setProperty(CSSPropertyUnicodeBidi, CSSValueEmbed);
     style->setProperty(CSSPropertyDirection, CSSValueRtl);
     frame->editor()->applyStyle(style.get(), EditActionSetWritingDirection);