command_buffer: Remove unused shared id code (GenSharedIdsCHROMIUM, ...)

gpu/command_buffer/common/id_allocator.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.
 
 // This file contains the definition of the IdAllocator class.
 
 #ifndef GPU_COMMAND_BUFFER_CLIENT_ID_ALLOCATOR_H_
 #define GPU_COMMAND_BUFFER_CLIENT_ID_ALLOCATOR_H_
 
 #include <stdint.h>
 
 #include <set>
 #include <utility>
 
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "gpu/gpu_export.h"
 
 namespace gpu {
 
 // A resource ID, key to the resource maps.
 typedef uint32_t ResourceId;
 // Invalid resource ID.
 static const ResourceId kInvalidResource = 0u;
 
-class GPU_EXPORT IdAllocatorInterface {
+// A class to manage the allocation of resource IDs.
+class GPU_EXPORT IdAllocator {
  public:
-  virtual ~IdAllocatorInterface();
+  IdAllocator();
+  ~IdAllocator();
 
   // Allocates a new resource ID.
-  virtual ResourceId AllocateID() = 0;
+  ResourceId AllocateID();
 
   // Allocates an Id starting at or above desired_id.
   // Note: may wrap if it starts near limit.
-  virtual ResourceId AllocateIDAtOrAbove(ResourceId desired_id) = 0;
+  ResourceId AllocateIDAtOrAbove(ResourceId desired_id);
 
   // Marks an id as used. Returns false if id was already used.
-  virtual bool MarkAsUsed(ResourceId id) = 0;
+  bool MarkAsUsed(ResourceId id);
 
   // Frees a resource ID.
-  virtual void FreeID(ResourceId id) = 0;
+  void FreeID(ResourceId id);
 
   // Checks whether or not a resource ID is in use.
-  virtual bool InUse(ResourceId id) const = 0;
-};
-
-// A class to manage the allocation of resource IDs.
-class GPU_EXPORT IdAllocator : public IdAllocatorInterface {
- public:
-  IdAllocator();
-  virtual ~IdAllocator();
-
-  // Implement IdAllocatorInterface.
-  virtual ResourceId AllocateID() OVERRIDE;
-  virtual ResourceId AllocateIDAtOrAbove(ResourceId desired_id) OVERRIDE;
-  virtual bool MarkAsUsed(ResourceId id) OVERRIDE;
-  virtual void FreeID(ResourceId id) OVERRIDE;
-  virtual bool InUse(ResourceId id) const OVERRIDE;
+  bool InUse(ResourceId id) const;
 
  private:
   // TODO(gman): This would work much better with ranges or a hash table.
   typedef std::set<ResourceId> ResourceIdSet;
 
   // The highest ID on the used list.
   ResourceId LastUsedId() const;
 
   // Lowest ID that isn't on the used list. This is slow, use as a last resort.
   ResourceId FindFirstUnusedId() const;
 
   ResourceIdSet used_ids_;
   ResourceIdSet free_ids_;
 
   DISALLOW_COPY_AND_ASSIGN(IdAllocator);
 };
 
-// A class to manage the allocation of resource IDs that are never reused. This
-// implementation does not track which IDs are currently used. It is useful for
-// shared and programs which cannot be implicitly created by binding a
-// previously unused ID.
-class NonReusedIdAllocator : public IdAllocatorInterface {
- public:
-  NonReusedIdAllocator();
-  virtual ~NonReusedIdAllocator();
-
-  // Implement IdAllocatorInterface.
-  virtual ResourceId AllocateID() OVERRIDE;
-  virtual ResourceId AllocateIDAtOrAbove(ResourceId desired_id) OVERRIDE;
-  virtual bool MarkAsUsed(ResourceId id) OVERRIDE;
-  virtual void FreeID(ResourceId id) OVERRIDE;
-  virtual bool InUse(ResourceId id) const OVERRIDE;
-
- private:
-  ResourceId last_id_;
-
-  DISALLOW_COPY_AND_ASSIGN(NonReusedIdAllocator);
-};
-
 }  // namespace gpu
 
 #endif  // GPU_COMMAND_BUFFER_CLIENT_ID_ALLOCATOR_H_