Pulled changes from issue 669220 to fix building with renderer=gles2.

core/cross/gles2/texture_gles2.cc

 /*
  * Copyright 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.
@@ skipping 301 matching lines @@
 
 // Creates a new texture object from scratch.
 Texture2DGLES2* Texture2DGLES2::Create(ServiceLocator* service_locator,
                                        Texture::Format format,
                                        int levels,
                                        int width,
                                        int height,
                                        bool enable_render_surfaces) {
   DLOG(INFO) << "Texture2DGLES2 Create";
   DCHECK_NE(format, Texture::UNKNOWN_FORMAT);
+  DCHECK_GE(levels, 0);
   RendererGLES2 *renderer = static_cast<RendererGLES2 *>(
       service_locator->GetService<Renderer>());
   renderer->MakeCurrentLazy();
   GLenum gl_internal_format = 0;
   GLenum gl_data_type = 0;
   GLenum gl_format = GLFormatFromO3DFormat(format,
                                            &gl_internal_format,
                                            &gl_data_type);
   if (gl_internal_format == 0) {
     DLOG(ERROR) << "Unsupported format in Texture2DGLES2::Create.";
@@ skipping 593 matching lines @@
   CHECK_GL_ERROR();
   return false;
 }
 
 const Texture::RGBASwizzleIndices&
     TextureCUBEGLES2::GetABGR32FSwizzleIndices() {
   return g_gl_abgr32f_swizzle_indices;
 }
 
 }  // namespace o3d