Fix crash caused by concurrent access to framebuffer_combo_complete_map_.

gpu/command_buffer/service/framebuffer_completeness_cache.h

+// Copyright 2015 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.
+
+#ifndef GPU_COMMAND_BUFFER_SERVICE_FRAMEBUFFER_COMPLETENESS_CACHE_H_
+#define GPU_COMMAND_BUFFER_SERVICE_FRAMEBUFFER_COMPLETENESS_CACHE_H_
+
+#include "base/containers/hash_tables.h"
+#include "base/memory/ref_counted.h"
+#include "gpu/gpu_export.h"
+
+namespace gpu {
+namespace gles2 {
+
+// Refcounted wrapper for a hash_set of framebuffer format signatures
+// representing [XXX]

[Ken Russell (switch to Gerrit), 2015/08/20 00:04:10]

Incomplete comment?

[Tobias Sargeant, 2015/08/20 11:05:13]

Yep. Oops.

+class GPU_EXPORT FramebufferCompletenessCache
+    : public base::RefCounted<FramebufferCompletenessCache> {
+ public:
+  FramebufferCompletenessCache();
+
+  bool IsComplete(const std::string& signature) const;
+  void SetComplete(const std::string& signature);
+
+ protected:
+  virtual ~FramebufferCompletenessCache();
+
+ private:
+  friend class base::RefCounted<FramebufferCompletenessCache>;
+
+  typedef base::hash_set<std::string> Map;
+
+  Map cache_;
+
+  DISALLOW_COPY_AND_ASSIGN(FramebufferCompletenessCache);
+};
+
+}  // namespace gles2
+}  // namespace gpu
+
+#endif  // GPU_COMMAND_BUFFER_COMMON_FRAMEBUFFER_COMPLETENESS_CACHE_H_

[no sievers, 2015/08/19 23:39:47]

nit: _COMMON_ -> _SERVICE_

[Tobias Sargeant, 2015/08/20 11:05:13]

Done.