Disable the transfer_buffer_ cache by forcing it to be empty; work around

content/common/gpu/client/command_buffer_proxy.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.
 
 #include "content/common/gpu/client/command_buffer_proxy.h"
 
 #include "base/callback.h"
 #include "base/debug/trace_event.h"
 #include "base/logging.h"
 #include "base/process_util.h"
@@ skipping 291 matching lines @@
     if (!shared_memory->Map(size)) {
       delete shared_memory;
       return Buffer();
     }
   }
 
   Buffer buffer;
   buffer.ptr = shared_memory->memory();
   buffer.size = size;
   buffer.shared_memory = shared_memory;
+  // todo(apatrick,nfullagar): re-enable when cache sync issues are solved.
+  // see: http://code.google.com/p/chromium/issues/detail?id=116285
+#define DISABLE_TRANSFER_BUFFER_CACHE
+#ifndef DISABLE_TRANSFER_BUFFER_CACHE
   transfer_buffers_[id] = buffer;

[piman, 2012/03/05 22:55:13]

How is the SharedMemory ever destroyed and unmapped now?

[apatrick_chromium, 2012/03/05 23:00:38]

Good point. Now the shared memory handles won't get closed and the transfer
buffers will all leak.

+#endif
 
   return buffer;
 }
 
 void CommandBufferProxy::SetToken(int32 token) {
   // Not implemented in proxy.
   NOTREACHED();
 }
 
 void CommandBufferProxy::OnNotifyRepaint() {
@@ skipping 124 matching lines @@
 
 void CommandBufferProxy::SetOnConsoleMessageCallback(
     const GpuConsoleMessageCallback& callback) {
   console_message_callback_ = callback;
 }
 
 void CommandBufferProxy::TryUpdateState() {
   if (last_state_.error == gpu::error::kNoError)
     shared_state_->Read(&last_state_);
 }