blink: Cleanup core class forward declarations

third_party/WebKit/Source/core/dom/Element.h

Index: third_party/WebKit/Source/core/dom/Element.h
diff --git a/third_party/WebKit/Source/core/dom/Element.h b/third_party/WebKit/Source/core/dom/Element.h
index fdb1718c8b9554d7ebc3ec5b4685cc743b1824ba..ae22bda3cf54494f3a71e79464e4a1ae51b5a17f 100644
--- a/third_party/WebKit/Source/core/dom/Element.h
+++ b/third_party/WebKit/Source/core/dom/Element.h
@@ -53,17 +53,15 @@ class CompositorMutation;
 class CustomElementDefinition;
 class DOMStringMap;
 class DOMTokenList;
-class Dictionary;
 class ElementRareData;
 class ElementShadow;
 class ExceptionState;
 class Image;
 class InputDeviceCapabilities;
-class IntSize;
 class Locale;
 class MutableStylePropertySet;
+class NamedNodeMap;
 class NodeIntersectionObserverData;
-class PropertySetCSSStyleDeclaration;
 class PseudoElement;
 class ResizeObservation;
 class ResizeObserver;