exo: Recreate Surface resources on context lost.

content/browser/compositor/image_transport_factory.h

 // 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.
 
 #ifndef CONTENT_BROWSER_COMPOSITOR_IMAGE_TRANSPORT_FACTORY_H_
 #define CONTENT_BROWSER_COMPOSITOR_IMAGE_TRANSPORT_FACTORY_H_
 
 #include <memory>
 #include <string>
 
@@ skipping 10 matching lines @@
 }
 
 namespace gfx {
 class Size;
 enum class SwapResult;
 }
 
 namespace ui {
 class Compositor;
 class ContextFactory;
+class ContextFactoryObserver;
 class Texture;
 }
 
 namespace display_compositor {
 class GLHelper;
 }
 
 namespace content {
 
-// This class provides a way to get notified when surface handles get lost.
-class CONTENT_EXPORT ImageTransportFactoryObserver {
- public:
-  virtual ~ImageTransportFactoryObserver() {}
-
-  // Notifies that the surface handles generated by ImageTransportFactory were
-  // lost.
-  // When this is called, the old resources (e.g. shared context, GL helper)
-  // still exist, but are about to be destroyed. Getting a reference to those
-  // resources from the ImageTransportFactory (e.g. through GetGLHelper) will
-  // return newly recreated, valid resources.
-  virtual void OnLostResources() = 0;
-};
-
 // This class provides the interface for creating the support for the
 // cross-process image transport, both for creating the shared surface handle
 // (destination surface for the GPU process) and the transport client (logic for
 // using that surface as a texture). The factory is a process-wide singleton.
 class CONTENT_EXPORT ImageTransportFactory {
  public:
   virtual ~ImageTransportFactory() {}
 
   // Initializes the global transport factory.
   static void Initialize();
@@ skipping 12 matching lines @@
   // Gets the image transport factory as a context factory for the compositor.
   virtual ui::ContextFactory* GetContextFactory() = 0;
 
   virtual cc::SurfaceManager* GetSurfaceManager() = 0;
 
   // Gets a GLHelper instance, associated with the shared context. This
   // GLHelper will get destroyed whenever the shared context is lost
   // (ImageTransportFactoryObserver::OnLostResources is called).
   virtual display_compositor::GLHelper* GetGLHelper() = 0;
 
-  virtual void AddObserver(ImageTransportFactoryObserver* observer) = 0;
-  virtual void RemoveObserver(ImageTransportFactoryObserver* observer) = 0;
-
 #if defined(OS_MACOSX)
   // Called with |suspended| as true when the ui::Compositor has been
   // disconnected from an NSView and may be attached to another one. Called
   // with |suspended| as false after the ui::Compositor has been connected to
   // a new NSView and the first commit targeted at the new NSView has
   // completed. This ensures that content and frames intended for the old
   // NSView will not flash in the new NSView.
   virtual void SetCompositorSuspendedForRecycle(ui::Compositor* compositor,
                                                 bool suspended) = 0;
 #endif
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_COMPOSITOR_IMAGE_TRANSPORT_FACTORY_H_