Revert 260177 "By keeping track of transfer buffer usage (both s..."

trunk/src/gpu/command_buffer/client/gles2_implementation.h

Index: trunk/src/gpu/command_buffer/client/gles2_implementation.h
===================================================================
--- trunk/src/gpu/command_buffer/client/gles2_implementation.h	(revision 260192)
+++ trunk/src/gpu/command_buffer/client/gles2_implementation.h	(working copy)
@@ -596,38 +596,6 @@
 
   void OnSwapBuffersComplete();
 
-  // Remove the transfer buffer from the buffer tracker. For buffers used
-  // asynchronously the memory is free:ed if the upload has completed. For
-  // other buffers, the memory is either free:ed immediately or free:ed pending
-  // a token.
-  void RemoveTransferBuffer(BufferTracker::Buffer* buffer);
-
-  // Returns true if the async upload token has passed.
-  //
-  // NOTE: This will detect wrapped async tokens by checking if the most
-  // significant  bit of async token to check is 1 but the last read is 0, i.e.
-  // the uint32 wrapped.
-  bool HasAsyncUploadTokenPassed(uint32 token) const {
-    return async_upload_sync_->HasAsyncUploadTokenPassed(token);
-  }
-
-  // Get the next async upload token.
-  uint32 NextAsyncUploadToken();
-
-  // Ensure that the shared memory used for synchronizing async upload tokens
-  // has been mapped.
-  //
-  // Returns false on error, true on success.
-  bool EnsureAsyncUploadSync();
-
-  // Checks the last read asynchronously upload token and frees any unmanaged
-  // transfer buffer that has its async token passed.
-  void PollAsyncUploads();
-
-  // Free every async upload buffer. If some async upload buffer is still in use
-  // wait for them to finish before freeing.
-  void FreeAllAsyncUploadBuffers();
-
   bool GetBoundPixelTransferBuffer(
       GLenum target, const char* function_name, GLuint* buffer_id);
   BufferTracker::Buffer* GetBoundPixelUnpackTransferBufferIfValid(
@@ -700,18 +668,6 @@
   GLuint bound_pixel_pack_transfer_buffer_id_;
   GLuint bound_pixel_unpack_transfer_buffer_id_;
 
-  // The current asynchronous pixel buffer upload token.
-  uint32 async_upload_token_;
-
-  // The shared memory used for synchronizing asynchronous upload tokens.
-  AsyncUploadSync* async_upload_sync_;
-  int32 async_upload_sync_shm_id_;
-  unsigned int async_upload_sync_shm_offset_;
-
-  // Unmanaged pixel transfer buffer memory pending asynchronous upload token.
-  typedef std::list<std::pair<void*, uint32> > DetachedAsyncUploadMemoryList;
-  DetachedAsyncUploadMemoryList detached_async_upload_memory_;
-
   // Client side management for vertex array objects. Needed to correctly
   // track client side arrays.
   scoped_ptr<VertexArrayObjectManager> vertex_array_object_manager_;