DestroyStreamTextureChromium should not disallow rendering

gpu/command_buffer/service/texture_manager.cc

Index: gpu/command_buffer/service/texture_manager.cc
diff --git a/gpu/command_buffer/service/texture_manager.cc b/gpu/command_buffer/service/texture_manager.cc
index 3a433d3105937f88716c6ad384aee09e2ad6d91a..349514320a5ac2b8f733c80fc472375e6c514f38 100644
--- a/gpu/command_buffer/service/texture_manager.cc
+++ b/gpu/command_buffer/service/texture_manager.cc
@@ -143,7 +143,9 @@ bool TextureManager::TextureInfo::MarkMipmapsGenerated(
 }
 
 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);