Add basic GL functionality to the passthrough command buffer.

gpu/command_buffer/service/texture_manager.h

 // 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.
 
 #ifndef GPU_COMMAND_BUFFER_SERVICE_TEXTURE_MANAGER_H_
 #define GPU_COMMAND_BUFFER_SERVICE_TEXTURE_MANAGER_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 47 matching lines @@
 
  private:
   friend class MailboxManagerSync;
   friend class MailboxManagerImpl;
 
   void SetMailboxManager(MailboxManager* mailbox_manager);
 
   MailboxManager* mailbox_manager_;
 };
 
+// A ref-counted version of the TextureBase class that deletes the texture after
+// all references have been released.
+class TexturePassthrough final : public TextureBase,
+                                 public base::RefCounted<TexturePassthrough> {
+ public:
+  explicit TexturePassthrough(GLuint service_id);
+
+  // Notify the texture that the context is lost and it shouldn't delete the
+  // native GL texture in the destructor
+  void MarkContextLost();
+
+ protected:
+  ~TexturePassthrough() override;
+
+ private:
+  friend class base::RefCounted<TexturePassthrough>;
+
+  bool have_context_;
+
+  DISALLOW_COPY_AND_ASSIGN(TexturePassthrough);
+};
+
 // Info about Textures currently in the system.
 // This class wraps a real GL texture, keeping track of its meta-data. It is
 // jointly owned by possibly multiple TextureRef.
 class GPU_EXPORT Texture final : public TextureBase {
  public:
   enum ImageState {
     // If an image is associated with the texture and image state is UNBOUND,
     // then sampling out of the texture or using it as a target for drawing
     // will not read/write from/to the image.
     UNBOUND,
@@ skipping 1128 matching lines @@
  private:
   DecoderTextureState* texture_state_;
   base::TimeTicks begin_time_;
   DISALLOW_COPY_AND_ASSIGN(ScopedTextureUploadTimer);
 };
 
 }  // namespace gles2
 }  // namespace gpu
 
 #endif  // GPU_COMMAND_BUFFER_SERVICE_TEXTURE_MANAGER_H_