Free the command buffer on destruction.

gpu/command_buffer/client/cmd_buffer_helper.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.
 
 // This file contains the implementation of the command buffer helper class.
 
 #include "../client/cmd_buffer_helper.h"
 #include "../common/command_buffer.h"
 #include "../common/trace_event.h"
 
@@ skipping 51 matching lines @@
 
   const int32 kJumpEntries =
       sizeof(cmd::Jump) / sizeof(*entries_);  // NOLINT
 
   total_entry_count_ = num_ring_buffer_entries;
   usable_entry_count_ = total_entry_count_ - kJumpEntries;
   put_ = state.put_offset;
   return true;
 }
 
+void CommandBufferHelper::FreeResources() {
+  if (HaveRingBuffer()) {
+    command_buffer_->DestroyTransferBuffer(ring_buffer_id_);
+    ring_buffer_id_ = -1;
+  }
+}
+
 void CommandBufferHelper::FreeRingBuffer() {
   GPU_CHECK_EQ(put_, get_offset());
-  if (HaveRingBuffer()) {
-    command_buffer_->DestroyTransferBuffer(ring_buffer_id_);
-    ring_buffer_id_ = -1;
-  }
+  FreeResources();
 }
 
 bool CommandBufferHelper::Initialize(int32 ring_buffer_size) {
   ring_buffer_size_ = ring_buffer_size;
   return AllocateRingBuffer();
 }
 
 CommandBufferHelper::~CommandBufferHelper() {
+  FreeResources();
 }
 
 bool CommandBufferHelper::FlushSync() {
   if (!usable()) {
     return false;
   }
   last_flush_time_ = clock();
   last_put_sent_ = put_;
   CommandBuffer::State state = command_buffer_->FlushSync(put_, get_offset());
   return state.error == error::kNoError;
@@ skipping 147 matching lines @@
   }
   return space;
 }
 
 error::Error CommandBufferHelper::GetError() {
   CommandBuffer::State state = command_buffer_->GetState();
   return static_cast<error::Error>(state.error);
 }
 
 }  // namespace gpu