WebGL 2: add types into glReadPixels

Source/modules/webgl/WebGL2RenderingContextBase.h

Index: Source/modules/webgl/WebGL2RenderingContextBase.h
diff --git a/Source/modules/webgl/WebGL2RenderingContextBase.h b/Source/modules/webgl/WebGL2RenderingContextBase.h
index 834b344cf848d63bdfcee7b7b7f313b0481b6670..57ed56fdd52608438145e14f5c904e4ad176e96f 100644
--- a/Source/modules/webgl/WebGL2RenderingContextBase.h
+++ b/Source/modules/webgl/WebGL2RenderingContextBase.h
@@ -199,6 +199,7 @@ protected:
     WebGLTexture* validateTextureBinding(const char* functionName, GLenum target, bool useSixEnumsForCubeMap) override;
     bool validateFramebufferTarget(GLenum target) override;
     bool validateReadPixelsFormatAndType(GLenum format, GLenum type) override;
+    DOMArrayBufferView::ViewType readPixelsExpectedArrayBufferViewType(GLenum type) override;
     WebGLFramebuffer* getFramebufferBinding(GLenum target) override;
     GLint getMaxTextureLevelForTarget(GLenum target) override;
     void renderbufferStorageImpl(GLenum target, GLsizei samples, GLenum internalformat, GLsizei width, GLsizei height, const char* functionName) override;