enable fallback path

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

 /*
  * Copyright (C) 2009 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 1083 matching lines @@
     }
     return true;
   }
 
   // Copy from the source directly to the texture via the gpu, without a
   // read-back to system memory.  Source could be canvas or imageBitmap.
   void texImageByGPU(TexImageFunctionID,
                      WebGLTexture*,
                      GLenum target,
                      GLint level,
-                     GLint internalformat,
-                     GLenum type,
                      GLint xoffset,
                      GLint yoffset,
                      GLint zoffset,
                      CanvasImageSource*,
                      const IntRect& sourceSubRectangle);
-  virtual bool canUseTexImageByGPU(TexImageFunctionID,
-                                   GLint internalformat,
-                                   GLenum type);
+  virtual bool canUseTexImageByGPU(GLenum type);
 
   virtual WebGLImageConversion::PixelStoreParams getPackPixelStoreParams();
   virtual WebGLImageConversion::PixelStoreParams getUnpackPixelStoreParams(
       TexImageDimension);
 
   // Helper function for copyTex{Sub}Image, check whether the internalformat
   // and the color buffer format of the current bound framebuffer combination
   // is valid.
   bool isTexInternalFormatColorBufferCombinationValid(GLenum texInternalFormat,
                                                       GLenum colorBufferFormat);
@@ skipping 514 matching lines @@
                             const CanvasContextCreationAttributes&,
                             unsigned);
   static bool supportOwnOffscreenSurface(ExecutionContext*);
   static std::unique_ptr<WebGraphicsContext3DProvider>
   createContextProviderInternal(HTMLCanvasElement*,
                                 ScriptState*,
                                 const CanvasContextCreationAttributes&,
                                 unsigned);
   void texImageCanvasByGPU(TexImageFunctionID,
                            HTMLCanvasElement*,
+                           GLenum,
                            GLuint,
-                           GLenum,
-                           GLenum,
                            GLint,
                            GLint,
+                           const IntRect&);
+  void texImageBitmapByGPU(ImageBitmap*,
+                           GLenum,
+                           GLuint,
+                           bool,
                            GLint,
-                           const IntRect& sourceSubRectangle);
-  void texImageBitmapByGPU(ImageBitmap*, GLuint, GLenum, GLenum, GLint, bool);
+                           GLint,
+                           const IntRect&);
 
   sk_sp<SkImage> makeImageSnapshot(SkImageInfo&);
   const unsigned m_version;
 
   bool isPaintable() const final { return drawingBuffer(); }
 };
 
 DEFINE_TYPE_CASTS(WebGLRenderingContextBase,
                   CanvasRenderingContext,
                   context,
                   context->is3d(),
                   context.is3d());
 
 }  // namespace blink
 
 WTF_ALLOW_MOVE_INIT_AND_COMPARE_WITH_MEM_FUNCTIONS(
     blink::WebGLRenderingContextBase::TextureUnitState);
 
 #endif  // WebGLRenderingContextBase_h