enable fallback path

third_party/WebKit/Source/modules/webgl/WebGL2RenderingContextBase.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 WebGL2RenderingContextBase_h
 #define WebGL2RenderingContextBase_h
 
 #include "bindings/core/v8/TraceWrapperMember.h"
 #include "modules/webgl/WebGLExtension.h"
 #include "modules/webgl/WebGLRenderingContextBase.h"
@@ skipping 1040 matching lines @@
                                        GLuint destinationOffset,
                                        GLuint length,
                                        WebGLBuffer**,
                                        void** outDestinationDataPtr,
                                        long long* outDestinationByteLength);
   const char* validateGetBufferSubDataBounds(const char* functionName,
                                              WebGLBuffer*,
                                              GLintptr sourceByteOffset,
                                              long long destinationByteLength);
 
-  bool canUseTexImageByGPU(TexImageFunctionID,
-                           GLint internalformat,
-                           GLenum type) override;
-
   void removeBoundBuffer(WebGLBuffer*) override;
 
   void resetUnpackParameters() override;
   void restoreUnpackParameters() override;
 
   void renderbufferStorageHelper(GLenum target,
                                  GLsizei samples,
                                  GLenum internalformat,
                                  GLsizei width,
                                  GLsizei height,
@@ skipping 42 matching lines @@
                   context,
                   context->is3d() &&
                       WebGLRenderingContextBase::getWebGLVersion(context) >= 2,
                   context.is3d() &&
                       WebGLRenderingContextBase::getWebGLVersion(&context) >=
                           2);
 
 }  // namespace blink
 
 #endif