Fix crash caused by concurrent access to framebuffer_combo_complete_map_.

gpu/command_buffer/service/in_process_command_buffer.h

 // Copyright 2013 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_IN_PROCESS_COMMAND_BUFFER_H_
 #define GPU_COMMAND_BUFFER_SERVICE_IN_PROCESS_COMMAND_BUFFER_H_
 
 #include <map>
 #include <vector>
 
@@ skipping 33 matching lines @@
 namespace gpu {
 class StreamTextureManagerInProcess;
 }
 #endif
 
 namespace gpu {
 class SyncPointManager;
 class ValueStateMap;
 
 namespace gles2 {
+class FramebufferCompletenessCache;
 class GLES2Decoder;
 class MailboxManager;
 class ShaderTranslatorCache;
 class SubscriptionRefSet;
 }
 
 class CommandBufferServiceBase;
 class GpuMemoryBufferManager;
 class GpuScheduler;
 class ImageFactory;
@@ skipping 73 matching lines @@
     // Queues a task to run as soon as possible.
     virtual void ScheduleTask(const base::Closure& task) = 0;
 
     // Schedules |callback| to run at an appropriate time for performing idle
     // work.
     virtual void ScheduleIdleWork(const base::Closure& task) = 0;
 
     virtual bool UseVirtualizedGLContexts() = 0;
     virtual scoped_refptr<gles2::ShaderTranslatorCache>
         shader_translator_cache() = 0;
+    virtual scoped_refptr<gles2::FramebufferCompletenessCache>
+    framebuffer_completeness_cache() = 0;
     virtual SyncPointManager* sync_point_manager() = 0;
     scoped_refptr<gfx::GLShareGroup> share_group();
     scoped_refptr<gles2::MailboxManager> mailbox_manager();
     scoped_refptr<gles2::SubscriptionRefSet> subscription_ref_set();
     scoped_refptr<gpu::ValueStateMap> pending_valuebuffer_state();
 
    private:
     scoped_refptr<gfx::GLShareGroup> share_group_;
     scoped_refptr<gles2::MailboxManager> mailbox_manager_;
     scoped_refptr<gles2::SubscriptionRefSet> subscription_ref_set_;
@@ skipping 115 matching lines @@
  public:
   explicit GpuInProcessThread(SyncPointManager* sync_point_manager);
 
   void AddRef() const override;
   void Release() const override;
   void ScheduleTask(const base::Closure& task) override;
   void ScheduleIdleWork(const base::Closure& callback) override;
   bool UseVirtualizedGLContexts() override;
   scoped_refptr<gles2::ShaderTranslatorCache> shader_translator_cache()
       override;
+  scoped_refptr<gles2::FramebufferCompletenessCache>
+  framebuffer_completeness_cache() override;
   SyncPointManager* sync_point_manager() override;
 
  private:
   ~GpuInProcessThread() override;
   friend class base::RefCountedThreadSafe<GpuInProcessThread>;
 
   SyncPointManager* sync_point_manager_;  // Non-owning.
   scoped_refptr<gpu::gles2::ShaderTranslatorCache> shader_translator_cache_;
+  scoped_refptr<gpu::gles2::FramebufferCompletenessCache>
+      framebuffer_completeness_cache_;
   DISALLOW_COPY_AND_ASSIGN(GpuInProcessThread);
 };
 
 }  // namespace gpu
 
 #endif  // GPU_COMMAND_BUFFER_SERVICE_IN_PROCESS_COMMAND_BUFFER_H_