blink: Cleanup Document.h class forward declarations

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

Index: third_party/WebKit/Source/core/dom/Document.h
diff --git a/third_party/WebKit/Source/core/dom/Document.h b/third_party/WebKit/Source/core/dom/Document.h
index 13aaebc06fb5e3d7bf3ebfd8240383ea0b9a502d..415c23bb464010b985f6085b69ac62fb1e8245da 100644
--- a/third_party/WebKit/Source/core/dom/Document.h
+++ b/third_party/WebKit/Source/core/dom/Document.h
@@ -68,12 +68,9 @@ class DocumentTimeline;
 class AXObjectCache;
 class Attr;
 class CDATASection;
-class CSSStyleDeclaration;
 class CSSStyleSheet;
 class CancellableTaskFactory;
 class CanvasFontCache;
-class CanvasRenderingContext2D;
-class CanvasRenderingContext2DOrWebGLRenderingContext;
 class CharacterData;
 class ChromeClient;
 class CompositorPendingAnimations;
@@ -103,13 +100,11 @@ class ExceptionState;
 class FloatQuad;
 class FloatRect;
 class FormController;
-class Frame;
 class FrameHost;
 class FrameRequestCallback;
 class FrameView;
 class HTMLAllCollection;
 class HTMLBodyElement;
-class HTMLCanvasElement;
 class HTMLCollection;
 class HTMLDialogElement;
 class HTMLElement;
@@ -122,7 +117,6 @@ class HTMLScriptElementOrSVGScriptElement;
 class HitTestRequest;
 class IdleRequestCallback;
 class IdleRequestOptions;
-class InputDeviceCapabilities;
 class IntersectionObserverController;
 class LayoutPoint;
 class LayoutView;
@@ -155,7 +149,6 @@ class ScriptRunner;
 class ScriptableDocumentParser;
 class ScriptedAnimationController;
 class ScriptedIdleTaskController;
-class ScrollStateCallback;
 class SecurityOrigin;
 class SegmentedString;
 class SelectorQueryCache;
@@ -165,7 +158,6 @@ class SnapCoordinator;
 class StringOrDictionary;
 class StyleEngine;
 class StyleResolver;
-class StyleSheet;
 class StyleSheetList;
 class Text;
 class TextAutosizer;
@@ -174,8 +166,6 @@ class TouchList;
 class TransformSource;
 class TreeWalker;
 class VisitedLinkState;
-class VisualViewport;
-class WebGLRenderingContext;
 enum class SelectionBehaviorOnFocus;
 struct AnnotatedRegionValue;
 struct FocusParams;