Implemented new fence syncs which replaces the old sync points.

gpu/command_buffer/service/mailbox_manager_sync.h

 // Copyright 2014 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_MAILBOX_MANAGER_SYNC_H_
 #define GPU_COMMAND_BUFFER_SERVICE_MAILBOX_MANAGER_SYNC_H_
 
 #include <map>
 #include <utility>
 
@@ skipping 15 matching lines @@
 // and across threads and driver level share groups by synchronizing
 // texture state.
 class GPU_EXPORT MailboxManagerSync : public MailboxManager {
  public:
   MailboxManagerSync();
 
   // MailboxManager implementation:
   Texture* ConsumeTexture(const Mailbox& mailbox) override;
   void ProduceTexture(const Mailbox& mailbox, Texture* texture) override;
   bool UsesSync() override;
-  void PushTextureUpdates(uint32 sync_point) override;
-  void PullTextureUpdates(uint32 sync_point) override;
+  void PushTextureUpdates(const SyncToken& token) override;
+  void PullTextureUpdates(const SyncToken& token) override;
   void TextureDeleted(Texture* texture) override;
 
  private:
   friend class base::RefCounted<MailboxManager>;
 
   static bool SkipTextureWorkarounds(const Texture* texture);
 
   ~MailboxManagerSync() override;
 
   class TextureGroup : public base::RefCounted<TextureGroup> {
@@ skipping 41 matching lines @@
   TextureToGroupMap texture_to_group_;
 
   DISALLOW_COPY_AND_ASSIGN(MailboxManagerSync);
 };
 
 }  // namespage gles2
 }  // namespace gpu
 
 #endif  // GPU_COMMAND_BUFFER_SERVICE_MAILBOX_MANAGER_SYNC_H_