DestroyStreamTextureChromium should not disallow rendering

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"
 
@@ skipping 125 matching lines @@
                    info1.format,
                    info1.type,
                    true);
     }
   }
 
   return true;
 }
 
 void TextureManager::TextureInfo::SetTarget(GLenum target, GLint max_levels) {
-  DCHECK_EQ(0u, target_);  // you can only set this once.
+  // You can only set target_ once for textures that are not
+  // GL_TEXTURE_EXTERNAL_OES .
+  DCHECK(0u == target_ || GL_TEXTURE_EXTERNAL_OES == target_);
   target_ = target;
   size_t num_faces = (target == GL_TEXTURE_CUBE_MAP) ? 6 : 1;
   level_infos_.resize(num_faces);
   for (size_t ii = 0; ii < num_faces; ++ii) {
     level_infos_[ii].resize(max_levels);
   }
 
   if (target == GL_TEXTURE_EXTERNAL_OES) {
     min_filter_ = GL_LINEAR;
     wrap_s_ = wrap_t_ = GL_CLAMP_TO_EDGE;
@@ skipping 680 matching lines @@
       return true;
     }
   }
   return false;
 }
 
 }  // namespace gles2
 }  // namespace gpu