16-bit video upload to float: intermediate R16_EXT and copy to float.

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

 /*
  * 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 5287 matching lines @@
     }
   }
 
   if (source_image_rect_is_default) {
     // Try using optimized CPU-GPU path for some formats: e.g. Y16 and Y8. It
     // leaves early for other formats or if frame is stored on GPU.
     ScopedUnpackParametersResetRestore(
         this, unpack_flip_y_ || unpack_premultiply_alpha_);
     if (video->TexImageImpl(
             static_cast<WebMediaPlayer::TexImageFunctionID>(function_id),
-            target, ContextGL(), level,
+            target, ContextGL(), texture->Object(), level,
             ConvertTexInternalFormat(internalformat, type), format, type,
             xoffset, yoffset, zoffset, unpack_flip_y_,
             unpack_premultiply_alpha_ &&
                 unpack_colorspace_conversion_ == GL_NONE)) {
       texture->UpdateLastUploadedVideo(video->GetWebMediaPlayer());
       return;
     }
   }
 
   if (use_copyTextureCHROMIUM) {
@@ skipping 2557 matching lines @@
 
 void WebGLRenderingContextBase::getHTMLOrOffscreenCanvas(
     HTMLCanvasElementOrOffscreenCanvas& result) const {
   if (canvas())
     result.setHTMLCanvasElement(canvas());
   else
     result.setOffscreenCanvas(offscreenCanvas());
 }
 
 }  // namespace blink