Workground for glGenerateMipmap bug in some drivers.

gpu/command_buffer/service/texture_manager.cc

 // Copyright (c) 2011 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 "base/bits.h"
 #include "gpu/command_buffer/common/gles2_cmd_utils.h"
 #include "gpu/command_buffer/service/feature_info.h"
 #include "gpu/command_buffer/service/gles2_cmd_decoder.h"
 #include "gpu/GLES2/gles2_command_buffer.h"
@@ skipping 262 matching lines @@
     default:
       NOTREACHED();
       break;
   }
   Update(feature_info);
 }
 
 void TextureManager::TextureInfo::Update(const FeatureInfo* feature_info) {
   // Update npot status.
   npot_ = false;
+
+  if (level_infos_.empty()) {
+    texture_complete_ = false;
+    cube_complete_ = false;
+    return;
+  }
+
   for (size_t ii = 0; ii < level_infos_.size(); ++ii) {
     const TextureInfo::LevelInfo& info = level_infos_[ii][0];
     if (GLES2Util::IsNPOT(info.width) ||
         GLES2Util::IsNPOT(info.height) ||
         GLES2Util::IsNPOT(info.depth)) {
       npot_ = true;
       break;
     }
   }
 
@@ skipping 231 matching lines @@
       return true;
     }
   }
   return false;
 }
 
 }  // namespace gles2
 }  // namespace gpu