Make glGetQueryObjectuivEXT return true for GL_QUERY_RESULT_AVAILABLE_EXT

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"
 
 namespace gpu {
 
 CommandBufferHelper::CommandBufferHelper(CommandBuffer* command_buffer)
     : command_buffer_(command_buffer),
       ring_buffer_id_(-1),
       ring_buffer_size_(0),
       entries_(NULL),
       total_entry_count_(0),
       usable_entry_count_(0),
       token_(0),
       put_(0),
       last_put_sent_(0),
       commands_issued_(0),
       usable_(true),
+      context_lost_(false),
       last_flush_time_(0) {
 }
 
+bool CommandBufferHelper::IsContextLost() {
+  if (!context_lost_) {
+    context_lost_ = error::IsError(command_buffer()->GetLastError());
+  }
+  return context_lost_;
+}
+
 bool CommandBufferHelper::AllocateRingBuffer() {
   if (!usable()) {
     return false;
   }
 
   if (HaveRingBuffer()) {
     return true;
   }
 
   int32 id = command_buffer_->CreateTransferBuffer(ring_buffer_size_, -1);
@@ skipping 210 matching lines @@
   }
   return space;
 }
 
 error::Error CommandBufferHelper::GetError() {
   CommandBuffer::State state = command_buffer_->GetState();
   return static_cast<error::Error>(state.error);
 }
 
 }  // namespace gpu