Modified GPU command signature hash to use a binary representation.

gpu/command_buffer/service/renderbuffer_manager.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_RENDERBUFFER_MANAGER_H_
 #define GPU_COMMAND_BUFFER_SERVICE_RENDERBUFFER_MANAGER_H_
 
 #include <string>
 #include "base/basictypes.h"
 #include "base/containers/hash_tables.h"
@@ skipping 51 matching lines @@
   void MarkAsValid() {
     has_been_bound_ = true;
   }
 
   bool IsValid() const {
     return has_been_bound_ && !IsDeleted();
   }
 
   size_t EstimatedSize();
 
+  size_t GetSignatureSize() const;
   void AddToSignature(std::string* signature) const;
 
  private:
   friend class RenderbufferManager;
   friend class base::RefCounted<Renderbuffer>;
 
   ~Renderbuffer();
 
   void set_cleared(bool cleared) {
     cleared_ = cleared;
@@ skipping 113 matching lines @@
   typedef base::hash_map<GLuint, scoped_refptr<Renderbuffer> > RenderbufferMap;
   RenderbufferMap renderbuffers_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderbufferManager);
 };
 
 }  // namespace gles2
 }  // namespace gpu
 
 #endif  // GPU_COMMAND_BUFFER_SERVICE_RENDERBUFFER_MANAGER_H_