Reset TexImage2D base level to workaround Intel mac driver bug

gpu/command_buffer/service/texture_manager.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.
 
 #include "gpu/command_buffer/service/texture_manager.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <algorithm>
@@ skipping 3332 matching lines @@
   ERRORSTATE_COPY_REAL_GL_ERRORS_TO_WRAPPER(error_state, function_name);
   {
     if (args.command_type == DoTexImageArguments::kTexImage3D) {
       glTexImage3D(
           args.target, args.level,
           AdjustTexInternalFormat(feature_info_.get(), args.internal_format),
           args.width, args.height, args.depth, args.border,
           AdjustTexFormat(feature_info_.get(), args.format), args.type,
           args.pixels);
     } else {
+      Texture* texture = texture_ref->texture();
+      GLint base_level = texture->base_level();
+      if (feature_info_->workarounds().reset_teximage2d_base_level &&
+          args.target == GL_TEXTURE_2D && base_level != 0) {
+        glTexParameteri(args.target, GL_TEXTURE_BASE_LEVEL, 0);
+      }
       glTexImage2D(
           args.target, args.level,
           AdjustTexInternalFormat(feature_info_.get(), args.internal_format),
           args.width, args.height, args.border,
           AdjustTexFormat(feature_info_.get(), args.format), args.type,
           args.pixels);
+      if (feature_info_->workarounds().reset_teximage2d_base_level &&
+          args.target == GL_TEXTURE_2D && base_level != 0) {
+        glTexParameteri(args.target, GL_TEXTURE_BASE_LEVEL, base_level);
+      }
     }
   }
   GLenum error = ERRORSTATE_PEEK_GL_ERROR(error_state, function_name);
   if (args.command_type == DoTexImageArguments::kTexImage3D) {
     UMA_HISTOGRAM_CUSTOM_ENUMERATION("GPU.Error_TexImage3D", error,
         GetAllGLErrors());
   } else {
     UMA_HISTOGRAM_CUSTOM_ENUMERATION("GPU.Error_TexImage2D", error,
         GetAllGLErrors());
   }
@@ skipping 392 matching lines @@
 uint32_t TextureManager::GetServiceIdGeneration() const {
   return current_service_id_generation_;
 }
 
 void TextureManager::IncrementServiceIdGeneration() {
   current_service_id_generation_++;
 }
 
 }  // namespace gles2
 }  // namespace gpu