gpu_fuzzer: Destroy the command decoder before the context.

gpu/command_buffer/tests/fuzzer_main.cc

 // Copyright 2016 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 <stddef.h>
 #include <stdint.h>
 
 #include <memory>
 #include <vector>
 
 #include "base/at_exit.h"
@@ skipping 172 matching lines @@
     if (!vertex_translator_) {
       // Keep a reference to the translators, which keeps them in the cache even
       // after the decoder is reset. They are expensive to initialize, but they
       // don't keep state.
       vertex_translator_ = decoder_->GetTranslator(GL_VERTEX_SHADER);
       fragment_translator_ = decoder_->GetTranslator(GL_FRAGMENT_SHADER);
     }
   }
 
   void ResetDecoder() {
+    decoder_->Destroy(true);
+    decoder_.reset();
     if (recreate_context_) {
       context_->ReleaseCurrent(nullptr);
       context_ = nullptr;
     }
-    decoder_->Destroy(true);
-    decoder_.reset();
     command_buffer_.reset();
   }
 
   ~CommandBufferSetup() {
     if (sync_point_order_data_) {
       sync_point_order_data_->Destroy();
       sync_point_order_data_ = nullptr;
     }
     if (sync_point_client_state_) {
       sync_point_client_state_->Destroy();
@@ skipping 127 matching lines @@
 // registered, causing crashes.
 CommandBufferSetup* g_setup = new CommandBufferSetup();
 
 }  // anonymous namespace
 }  // namespace gpu
 
 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
   gpu::g_setup->RunCommandBuffer(data, size);
   return 0;
 }