Add a base class of Texture for interfacing with the mailbox manager.

gpu/command_buffer/service/gles2_cmd_decoder.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/gles2_cmd_decoder.h"
 
 #include <limits.h>
 #include <stddef.h>
 #include <stdint.h>
 #include <stdio.h>
@@ skipping 4773 matching lines @@
   // that.
   SavedBackTexture save;
   save.back_texture.swap(offscreen_saved_color_texture_);
   save.in_use = true;
   saved_back_textures_.push_back(std::move(save));
 
   CreateBackTexture();
 }
 
 void GLES2DecoderImpl::ReturnFrontBuffer(const Mailbox& mailbox, bool is_lost) {
-  Texture* texture = mailbox_manager()->ConsumeTexture(mailbox);
+  TextureBase* texture_base = mailbox_manager()->ConsumeTexture(mailbox);
+  Texture* texture = texture_base ? texture_base->AsTexture() : nullptr;
+
   for (auto it = saved_back_textures_.begin(); it != saved_back_textures_.end();
        ++it) {
     if (texture != it->back_texture->texture_ref()->texture())
       continue;
 
     if (is_lost || it->back_texture->size() != offscreen_size_) {
       it->back_texture->Invalidate();
       saved_back_textures_.erase(it);
       return;
     }
@@ skipping 11239 matching lines @@
                        "unknown texture for target");
     return;
   }
   GLuint client_id = texture_ref->client_id();
   if (!client_id) {
     LOCAL_SET_GL_ERROR(
         GL_INVALID_OPERATION,
         "glConsumeTextureCHROMIUM", "unknown texture for target");
     return;
   }
-  Texture* texture = group_->mailbox_manager()->ConsumeTexture(mailbox);
+
+  TextureBase* texture_base =
+      group_->mailbox_manager()->ConsumeTexture(mailbox);
+  Texture* texture = texture_base ? texture_base->AsTexture() : nullptr;
   if (!texture) {
     LOCAL_SET_GL_ERROR(
         GL_INVALID_OPERATION,
         "glConsumeTextureCHROMIUM", "invalid mailbox name");
     return;
   }
   if (texture->target() != target) {
     LOCAL_SET_GL_ERROR(
         GL_INVALID_OPERATION,
         "glConsumeTextureCHROMIUM", "invalid target");
@@ skipping 39 matching lines @@
 
   TextureRef* texture_ref = GetTexture(client_id);
   if (texture_ref) {
     // No need to call EnsureTextureForClientId here, the client_id already has
     // an associated texture.
     LOCAL_SET_GL_ERROR(
         GL_INVALID_OPERATION,
         "glCreateAndConsumeTextureCHROMIUM", "client id already in use");
     return;
   }
-  Texture* texture = group_->mailbox_manager()->ConsumeTexture(mailbox);
+  TextureBase* texture_base =
+      group_->mailbox_manager()->ConsumeTexture(mailbox);
+  Texture* texture = texture_base ? texture_base->AsTexture() : nullptr;
   if (!texture) {
     EnsureTextureForClientId(target, client_id);
     LOCAL_SET_GL_ERROR(
         GL_INVALID_OPERATION,
         "glCreateAndConsumeTextureCHROMIUM", "invalid mailbox name");
     return;
   }
 
   if (texture->target() != target) {
     EnsureTextureForClientId(target, client_id);
@@ skipping 1804 matching lines @@
 }
 
 // Include the auto-generated part of this file. We split this because it means
 // we can easily edit the non-auto generated parts right here in this file
 // instead of having to edit some template or the code generator.
 #include "base/macros.h"
 #include "gpu/command_buffer/service/gles2_cmd_decoder_autogen.h"
 
 }  // namespace gles2
 }  // namespace gpu