Add basic GL functionality to the passthrough command buffer.

gpu/command_buffer/service/texture_manager.cc

 // 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.
 
 #include "gpu/command_buffer/service/texture_manager.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <algorithm>
@@ skipping 354 matching lines @@
     mailbox_manager_->TextureDeleted(this);
     mailbox_manager_ = nullptr;
   }
 }
 
 void TextureBase::SetMailboxManager(MailboxManager* mailbox_manager) {
   DCHECK(!mailbox_manager_ || mailbox_manager_ == mailbox_manager);
   mailbox_manager_ = mailbox_manager;
 }
 
+TexturePassthrough::TexturePassthrough(GLuint service_id)
+    : TextureBase(service_id), have_context_(true) {}
+
+TexturePassthrough::~TexturePassthrough() {
+  DeleteFromMailboxManager();
+  if (have_context_) {
+    glDeleteTextures(1, &service_id_);
+  }
+}
+
+void TexturePassthrough::MarkContextLost() {
+  have_context_ = false;
+}
+
 Texture::Texture(GLuint service_id)
     : TextureBase(service_id),
       memory_tracking_ref_(NULL),
       owned_service_id_(service_id),
       cleared_(true),
       num_uncleared_mips_(0),
       num_npot_faces_(0),
       target_(0),
       usage_(GL_NONE),
       base_level_(0),
@@ skipping 3015 matching lines @@
 uint32_t TextureManager::GetServiceIdGeneration() const {
   return current_service_id_generation_;
 }
 
 void TextureManager::IncrementServiceIdGeneration() {
   current_service_id_generation_++;
 }
 
 }  // namespace gles2
 }  // namespace gpu