blink: Cleanup class forward declarations

third_party/WebKit/Source/modules/webgl/WebGL2RenderingContext.h

 // Copyright 2015 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 WebGL2RenderingContext_h
 #define WebGL2RenderingContext_h
 
 #include "core/html/canvas/CanvasRenderingContextFactory.h"
 #include "modules/webgl/WebGL2RenderingContextBase.h"
 #include <memory>
 
 namespace blink {
 
 class CanvasContextCreationAttributes;
 class EXTColorBufferFloat;
+class EXTTextureFilterAnisotropic;
+class OESTextureFloatLinear;
+class WebGLDebugRendererInfo;
+class WebGLLoseContext;
 
 class WebGL2RenderingContext : public WebGL2RenderingContextBase {
   DEFINE_WRAPPERTYPEINFO();
 
  public:
   class Factory : public CanvasRenderingContextFactory {
     WTF_MAKE_NONCOPYABLE(Factory);
 
    public:
     Factory() {}
@@ skipping 50 matching lines @@
                   context,
                   context->is3d() &&
                       WebGLRenderingContextBase::getWebGLVersion(context) == 2,
                   context.is3d() &&
                       WebGLRenderingContextBase::getWebGLVersion(&context) ==
                           2);
 
 }  // namespace blink
 
 #endif