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

third_party/WebKit/public/platform/WebMediaPlayer.h

 /*
  * Copyright (C) 2009 Google 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 203 matching lines @@
                                                     bool premultiply_alpha,
                                                     bool flip_y) {
     return false;
   }
 
   // Do tex(Sub)Image2D/3D for current frame. If it is not implemented for given
   // parameters or fails, it returns false.
   // The method is wrapping calls to glTexImage2D, glTexSubImage2D,
   // glTexImage3D and glTexSubImage3D and parameters have the same name and
   // meaning.
-  // Texture needs to be created and bound to active texture unit before this
-  // call. In addition, TexSubImage2D and TexSubImage3D require that previous
-  // TexImage2D and TexSubImage3D calls, respectivelly, defined the texture
-  // content.
+  // Texture |texture| needs to be created and bound to active texture unit
+  // before this call. In addition, TexSubImage2D and TexSubImage3D require that
+  // previous TexImage2D and TexSubImage3D calls, respectively, defined the
+  // texture content.
   virtual bool TexImageImpl(TexImageFunctionID function_id,
                             unsigned target,
                             gpu::gles2::GLES2Interface* gl,
+                            unsigned texture,
                             int level,
                             int internalformat,
                             unsigned format,
                             unsigned type,
                             int xoffset,
                             int yoffset,
                             int zoffset,
                             bool flip_y,
                             bool premultiply_alpha) {
     return false;
@@ skipping 45 matching lines @@
   virtual bool GetLastUploadedFrameInfo(unsigned* width,
                                         unsigned* height,
                                         double* timestamp) {
     return false;
   }
 };
 
 }  // namespace blink
 
 #endif