Reland of Extend CopyTextureCHROMIUM to more ES 3.0 texture formats.

gpu/command_buffer/common/gles2_cmd_utils.h

 // 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.
 
 // This file is here so other GLES2 related files can have a common set of
 // includes where appropriate.
 
 #ifndef GPU_COMMAND_BUFFER_COMMON_GLES2_CMD_UTILS_H_
 #define GPU_COMMAND_BUFFER_COMMON_GLES2_CMD_UTILS_H_
 
@@ skipping 122 matching lines @@
   }
 
   void set_num_shader_binary_formats(int num_shader_binary_formats) {
     num_shader_binary_formats_ = num_shader_binary_formats;
   }
 
   // Gets the number of values a particular id will return when a glGet
   // function is called. If 0 is returned the id is invalid.
   int GLGetNumValuesReturned(int id) const;
 
+  static int ElementsPerGroup(int format, int type);
   // Computes the size of a single group of elements from a format and type pair
   static uint32_t ComputeImageGroupSize(int format, int type);
 
   // Computes the size of an image row including alignment padding
   static bool ComputeImagePaddedRowSize(
       int width, int format, int type, int alignment,
       uint32_t* padded_row_size);
 
   // Computes the size of image data for TexImage2D and TexSubImage2D.
   // Optionally the unpadded and padded row sizes can be returned.
@@ skipping 176 matching lines @@
   bool should_use_native_gmb_for_backbuffer;
 
   ContextType context_type;
 };
 
 }  // namespace gles2
 }  // namespace gpu
 
 #endif  // GPU_COMMAND_BUFFER_COMMON_GLES2_CMD_UTILS_H_