enable fallback path

third_party/WebKit/Source/modules/webgl/WebGL2RenderingContextBase.cpp

 // 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.
 
 #include "modules/webgl/WebGL2RenderingContextBase.h"
 
 #include "bindings/modules/v8/WebGLAny.h"
 #include "core/frame/ImageBitmap.h"
 #include "core/html/HTMLCanvasElement.h"
 #include "core/html/HTMLImageElement.h"
@@ skipping 614 matching lines @@
   }
   return true;
 }
 
 IntRect WebGL2RenderingContextBase::getTextureSourceSubRectangle(
     GLsizei width,
     GLsizei height) {
   return IntRect(m_unpackSkipPixels, m_unpackSkipRows, width, height);
 }
 
-bool WebGL2RenderingContextBase::canUseTexImageByGPU(
-    TexImageFunctionID functionID,
-    GLint internalformat,
-    GLenum type) {
-  switch (internalformat) {
-    case GL_RGB565:
-    case GL_RGBA4:
-    case GL_RGB5_A1:
-      // FIXME: ES3 limitation that CopyTexImage with sized internalformat,
-      // component sizes have to match the source color format.
-      return false;
-    default:
-      break;
-  }
-  return WebGLRenderingContextBase::canUseTexImageByGPU(functionID,
-                                                        internalformat, type);
-}
-
 void WebGL2RenderingContextBase::invalidateFramebuffer(
     GLenum target,
     const Vector<GLenum>& attachments) {
   if (isContextLost())
     return;
 
   Vector<GLenum> translatedAttachments = attachments;
   if (!checkAndTranslateAttachments("invalidateFramebuffer", target,
                                     translatedAttachments))
     return;
@@ skipping 5004 matching lines @@
 
 void WebGL2RenderingContextBase::
     DrawingBufferClientRestorePixelUnpackBufferBinding() {
   if (!contextGL())
     return;
   contextGL()->BindBuffer(GL_PIXEL_UNPACK_BUFFER,
                           objectOrZero(m_boundPixelUnpackBuffer.get()));
 }
 
 }  // namespace blink