Make RenderObject::style() return a const object

Source/core/html/shadow/TextControlInnerElements.cpp

Index: Source/core/html/shadow/TextControlInnerElements.cpp
diff --git a/Source/core/html/shadow/TextControlInnerElements.cpp b/Source/core/html/shadow/TextControlInnerElements.cpp
index 18ce2f2e72cad85e4c1f286b367969a512fd8536..c161fff19b069e328c53a0bd6a03fd327b2360ce 100644
--- a/Source/core/html/shadow/TextControlInnerElements.cpp
+++ b/Source/core/html/shadow/TextControlInnerElements.cpp
@@ -57,7 +57,7 @@ PassRefPtrWillBeRawPtr<TextControlInnerContainer> TextControlInnerContainer::cre
     return element.release();
 }
 
-RenderObject* TextControlInnerContainer::createRenderer(RenderStyle*)
+RenderObject* TextControlInnerContainer::createRenderer(const RenderStyle*)
 {
     return new RenderTextControlInnerContainer(this);
 }
@@ -130,7 +130,7 @@ void TextControlInnerEditorElement::defaultEventHandler(Event* event)
         HTMLDivElement::defaultEventHandler(event);
 }
 
-RenderObject* TextControlInnerEditorElement::createRenderer(RenderStyle*)
+RenderObject* TextControlInnerEditorElement::createRenderer(const RenderStyle*)
 {
     return new RenderTextControlInnerBlock(this);
 }