gpu, cmaa: improve |do_copy| condition logic

gpu/command_buffer/service/framebuffer_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_FRAMEBUFFER_MANAGER_H_
 #define GPU_COMMAND_BUFFER_SERVICE_FRAMEBUFFER_MANAGER_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 31 matching lines @@
     virtual GLsizei samples() const = 0;
     virtual GLuint object_name() const = 0;
     virtual bool cleared() const = 0;
     virtual void SetCleared(
         RenderbufferManager* renderbuffer_manager,
         TextureManager* texture_manager,
         bool cleared) = 0;
     virtual bool IsPartiallyCleared() const = 0;
     virtual bool IsTextureAttachment() const = 0;
     virtual bool IsRenderbufferAttachment() const = 0;
+    virtual bool IsTextureAttachmentImmutable() const = 0;
     virtual bool IsTexture(TextureRef* texture) const = 0;
     virtual bool IsRenderbuffer(Renderbuffer* renderbuffer) const = 0;
     virtual bool IsSameAttachment(const Attachment* attachment) const = 0;
     virtual bool Is3D() const = 0;
 
     // If it's a 3D texture attachment, return true if
     // FRAMEBUFFER_ATTACHMENT_TEXTURE_LAYER is smaller than the number of
     // layers in the texture.
     virtual bool IsLayerValid() const = 0;
 
@@ skipping 310 matching lines @@
 
   scoped_refptr<FramebufferCompletenessCache> framebuffer_combo_complete_cache_;
 
   DISALLOW_COPY_AND_ASSIGN(FramebufferManager);
 };
 
 }  // namespace gles2
 }  // namespace gpu
 
 #endif  // GPU_COMMAND_BUFFER_SERVICE_FRAMEBUFFER_MANAGER_H_