Upgrade Tex{Sub}Image{2|3}D to handle ES3 unpack parameters.

gpu/command_buffer/common/gles2_cmd_utils.h

Index: gpu/command_buffer/common/gles2_cmd_utils.h
diff --git a/gpu/command_buffer/common/gles2_cmd_utils.h b/gpu/command_buffer/common/gles2_cmd_utils.h
index 99637659cf5bf8ca612690c820dbe1220333eaac..9104fcd68b9dfc7d8b14d94dfb13749598a40d74 100644
--- a/gpu/command_buffer/common/gles2_cmd_utils.h
+++ b/gpu/command_buffer/common/gles2_cmd_utils.h
@@ -155,6 +155,8 @@ class GLES2_UTILS_EXPORT GLES2Util {
   // For example, GL_FLOAT_MAT3 returns 9.
   static uint32_t GetElementCountForUniformType(int type);
 
+  static size_t GetGLTypeSizeForTextures(uint32_t type);
+
   static size_t GetGLTypeSizeForBuffers(uint32_t type);
 
   static size_t GetGroupSizeForBufferType(uint32_t count, uint32_t type);