Support 2D texture sub-source uploads from HTMLImageElement.

gpu/command_buffer/client/gles2_implementation.cc

 // Copyright (c) 2012 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.
 
 // A class to emulate GLES2 over command buffers.
 
 #include "gpu/command_buffer/client/gles2_implementation.h"
 
 #include <GLES2/gl2.h>
 #include <GLES2/gl2ext.h>
@@ skipping 2531 matching lines @@
     SetGLError(GL_INVALID_OPERATION, func_name,
                "invalid unpack params combination");
     return;
   }
 
   uint32_t size;
   uint32_t unpadded_row_size;
   uint32_t padded_row_size;
   uint32_t skip_size;
   PixelStoreParams params = GetUnpackParameters(k2D);
+
   if (!GLES2Util::ComputeImageDataSizesES3(width, height, 1,
                                            format, type,
                                            params,
                                            &size,
                                            &unpadded_row_size,
                                            &padded_row_size,
                                            &skip_size,
                                            nullptr)) {
     SetGLError(GL_INVALID_VALUE, func_name, "image size too large");
     return;
@@ skipping 4463 matching lines @@
   cached_extensions_.clear();
 }
 
 // Include the auto-generated part of this file. We split this because it means
 // we can easily edit the non-auto generated parts right here in this file
 // instead of having to edit some template or the code generator.
 #include "gpu/command_buffer/client/gles2_implementation_impl_autogen.h"
 
 }  // namespace gles2
 }  // namespace gpu