blink: Cleanup class forward declarations

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

Index: third_party/WebKit/Source/modules/webgl/WebGLRenderingContext.h
diff --git a/third_party/WebKit/Source/modules/webgl/WebGLRenderingContext.h b/third_party/WebKit/Source/modules/webgl/WebGLRenderingContext.h
index c945a9faa7fc99650dda2a1273809b8ad7906c99..faf9281a71ae576ac82d81523d58716d2235cdeb 100644
--- a/third_party/WebKit/Source/modules/webgl/WebGLRenderingContext.h
+++ b/third_party/WebKit/Source/modules/webgl/WebGLRenderingContext.h
@@ -32,7 +32,18 @@
 
 namespace blink {
 
+class ANGLEInstancedArrays;
 class CanvasContextCreationAttributes;
+class EXTBlendMinMax;
+class EXTFragDepth;
+class EXTShaderTextureLOD;
+class EXTTextureFilterAnisotropic;
+class OESElementIndexUint;
+class OESStandardDerivatives;
+class OESTextureFloatLinear;
+class OESTextureHalfFloatLinear;
+class WebGLDebugRendererInfo;
+class WebGLLoseContext;
 
 class WebGLRenderingContext final : public WebGLRenderingContextBase {
   DEFINE_WRAPPERTYPEINFO();