[CSS Typed OM] Rearrange StylePropertyMap classes to match the new spec.

third_party/WebKit/Source/core/css/cssom/ComputedStylePropertyMap.h

 // Copyright 2016 the Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef ComputedStylePropertyMap_h
 #define ComputedStylePropertyMap_h
 
 #include "core/css/CSSComputedStyleDeclaration.h"
-#include "core/css/cssom/ImmutableStylePropertyMap.h"
+#include "core/css/cssom/StylePropertyMapReadonly.h"
 #include "core/dom/Node.h"
 #include "core/layout/LayoutObject.h"
 
 namespace blink {
 
 // This class implements computed StylePropertMapReadOnly in the Typed CSSOM
 // API. The specification is here:
 // https://drafts.css-houdini.org/css-typed-om-1/#computed-stylepropertymapreadonly-objects
 //
 // The computed StylePropertyMapReadOnly retrieves computed styles and returns
 // them as CSSStyleValues. The IDL for this class is in StylePropertyMap.idl.
 // The computed StylePropertyMapReadOnly for an element is accessed via
 // window.getComputedStyleMap(element) (see WindowGetComputedStyle.idl/h)
-class CORE_EXPORT ComputedStylePropertyMap : public ImmutableStylePropertyMap {
+class CORE_EXPORT ComputedStylePropertyMap : public StylePropertyMapReadonly {
   WTF_MAKE_NONCOPYABLE(ComputedStylePropertyMap);
 
  public:
   static ComputedStylePropertyMap* create(Node* node,
                                           const String& pseudoElement) {
     return new ComputedStylePropertyMap(node, pseudoElement);
   }
 
   Vector<String> getProperties() override;
 
   DEFINE_INLINE_VIRTUAL_TRACE() {
     visitor->trace(m_computedStyleDeclaration);
     visitor->trace(m_node);
-    ImmutableStylePropertyMap::trace(visitor);
+    StylePropertyMapReadonly::trace(visitor);
   }
 
  private:
   Node* node() const;
 
  protected:
   ComputedStylePropertyMap(Node* node, const String& pseudoElement = String())
-      : ImmutableStylePropertyMap(),
+      : StylePropertyMapReadonly(),
         m_computedStyleDeclaration(
             CSSComputedStyleDeclaration::create(node, false, pseudoElement)),
         m_pseudoId(CSSSelector::parsePseudoId(pseudoElement)),
         m_node(node) {}
 
   CSSStyleValueVector getAllInternal(CSSPropertyID) override;
   CSSStyleValueVector getAllInternal(AtomicString customPropertyName) override;
 
   HeapVector<StylePropertyMapEntry> getIterationEntries() override {
     return HeapVector<StylePropertyMapEntry>();
   }
 
   Member<CSSComputedStyleDeclaration> m_computedStyleDeclaration;
   PseudoId m_pseudoId;
   Member<Node> m_node;
 };
 
 }  // namespace blink
 
 #endif