Fix crash caused by concurrent access to framebuffer_combo_complete_map_.

gpu/command_buffer/service/context_group.h

 // 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.
 
 #ifndef GPU_COMMAND_BUFFER_SERVICE_CONTEXT_GROUP_H_
 #define GPU_COMMAND_BUFFER_SERVICE_CONTEXT_GROUP_H_
 
 #include <vector>
 #include "base/basictypes.h"
 #include "base/containers/hash_tables.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "gpu/command_buffer/common/constants.h"
 #include "gpu/command_buffer/common/gles2_cmd_format.h"
 #include "gpu/command_buffer/service/feature_info.h"
+#include "gpu/command_buffer/service/framebuffer_completeness_cache.h"
 #include "gpu/command_buffer/service/shader_translator_cache.h"
 #include "gpu/gpu_export.h"
 
 namespace gpu {
 
 class TransferBufferManagerInterface;
 class ValueStateMap;
 
 namespace gles2 {
 
@@ skipping 22 matching lines @@
     CONTEXT_TYPE_OTHER,
     CONTEXT_TYPE_UNDEFINED
   };
 
   static ContextType GetContextType(unsigned webgl_version);
 
   ContextGroup(
       const scoped_refptr<MailboxManager>& mailbox_manager,
       const scoped_refptr<MemoryTracker>& memory_tracker,
       const scoped_refptr<ShaderTranslatorCache>& shader_translator_cache,
+      const scoped_refptr<FramebufferCompletenessCache>&
+          framebuffer_completeness_cache,
       const scoped_refptr<FeatureInfo>& feature_info,
       const scoped_refptr<SubscriptionRefSet>& subscription_ref_set,
       const scoped_refptr<ValueStateMap>& pending_valuebuffer_state,
       bool bind_generates_resource);
 
   // This should only be called by GLES2Decoder. This must be paired with a
   // call to destroy if it succeeds.
   bool Initialize(
       GLES2Decoder* decoder,
       ContextType context_type,
       const DisallowedFeatures& disallowed_features);
 
   // Destroys all the resources when called for the last context in the group.
   // It should only be called by GLES2Decoder.
   void Destroy(GLES2Decoder* decoder, bool have_context);
 
   MailboxManager* mailbox_manager() const {
     return mailbox_manager_.get();
   }
 
   MemoryTracker* memory_tracker() const {
     return memory_tracker_.get();
   }
 
   ShaderTranslatorCache* shader_translator_cache() const {
     return shader_translator_cache_.get();
   }
 
+  FramebufferCompletenessCache* framebuffer_completeness_cache() const {
+    return framebuffer_completeness_cache_.get();
+  }
+
   bool bind_generates_resource() {
     return bind_generates_resource_;
   }
 
   uint32 max_vertex_attribs() const {
     return max_vertex_attribs_;
   }
 
   uint32 max_texture_units() const {
     return max_texture_units_;
@@ skipping 153 matching lines @@
   bool CheckGLFeatureU(GLint min_required, uint32* v);
   bool QueryGLFeature(GLenum pname, GLint min_required, GLint* v);
   bool QueryGLFeatureU(GLenum pname, GLint min_required, uint32* v);
   bool HaveContexts();
 
   ContextType context_type_;
 
   scoped_refptr<MailboxManager> mailbox_manager_;
   scoped_refptr<MemoryTracker> memory_tracker_;
   scoped_refptr<ShaderTranslatorCache> shader_translator_cache_;
+  scoped_refptr<FramebufferCompletenessCache> framebuffer_completeness_cache_;
   scoped_refptr<TransferBufferManagerInterface> transfer_buffer_manager_;
   scoped_refptr<SubscriptionRefSet> subscription_ref_set_;
   scoped_refptr<ValueStateMap> pending_valuebuffer_state_;
 
   bool enforce_gl_minimums_;
   bool bind_generates_resource_;
 
   uint32 max_vertex_attribs_;
   uint32 max_texture_units_;
   uint32 max_texture_image_units_;
@@ skipping 33 matching lines @@
 
   DISALLOW_COPY_AND_ASSIGN(ContextGroup);
 };
 
 }  // namespace gles2
 }  // namespace gpu
 
 #endif  // GPU_COMMAND_BUFFER_SERVICE_CONTEXT_GROUP_H_