Revert of [Reland 1] Pepper takes ownership of a mailbox before passing it to the texture layer.

components/mus/gles2/command_buffer_impl.cc

 // 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.
 
 #include "components/mus/gles2/command_buffer_impl.h"
 
 #include "base/bind.h"
 #include "base/macros.h"
 #include "base/message_loop/message_loop.h"
 #include "components/mus/gles2/command_buffer_driver.h"
@@ skipping 119 matching lines @@
       driver_.get(), base::Bind(&CommandBufferImpl::DestroyImageOnGpuThread,
                                 base::Unretained(this), id));
 }
 
 void CommandBufferImpl::CreateStreamTexture(
     uint32_t client_texture_id,
     const mojom::CommandBuffer::CreateStreamTextureCallback& callback) {
   NOTIMPLEMENTED();
 }
 
-void CommandBufferImpl::TakeFrontBuffer(const gpu::Mailbox& mailbox) {
+void CommandBufferImpl::ProduceFrontBuffer(const gpu::Mailbox& mailbox) {
   NOTIMPLEMENTED();
 }
 
-void CommandBufferImpl::ReturnFrontBuffer(const gpu::Mailbox& mailbox,
-                                          bool is_lost) {
-  NOTIMPLEMENTED();
-}
-
 void CommandBufferImpl::SignalQuery(uint32_t query, uint32_t signal_id) {
   NOTIMPLEMENTED();
 }
 
 void CommandBufferImpl::SignalSyncToken(const gpu::SyncToken& sync_token,
                                         uint32_t signal_id) {
   NOTIMPLEMENTED();
 }
 
 void CommandBufferImpl::WaitForGetOffsetInRange(
@@ skipping 130 matching lines @@
 bool CommandBufferImpl::DeleteOnGpuThread() {
   delete this;
   return true;
 }
 
 void CommandBufferImpl::DeleteOnGpuThread2() {
   delete this;
 }
 
 }  // namespace mus