Add content::SurfaceCapturer

content/browser/aura/image_transport_factory.h

Index: content/browser/aura/image_transport_factory.h
diff --git a/content/browser/aura/image_transport_factory.h b/content/browser/aura/image_transport_factory.h
index 85fba7d53004126a82dd3d6bca490a024c545ff1..770002f4ec971b240a8fc9b79e608bad7f0228b9 100644
--- a/content/browser/aura/image_transport_factory.h
+++ b/content/browser/aura/image_transport_factory.h
@@ -8,6 +8,7 @@
 #include <string>
 
 #include "base/memory/ref_counted.h"
+#include "content/common/gpu/surface_capturer.h"
 #include "ui/gfx/native_widget_types.h"
 
 namespace gfx {
@@ -15,6 +16,7 @@ class Size;
 }
 
 namespace ui {
+class Compositor;
 class ContextFactory;
 class Texture;
 }
@@ -40,6 +42,21 @@ class ImageTransportFactoryObserver {
   virtual void OnLostResources() = 0;
 };
 
+// This class provides the interface for creating a ui::ContextFactory that
+// supports creation of a SurfaceCapturer that captures the output of a given
+// ui::Compositor.  The factory instance is retrieved from the
+// ImageTransportFactory.
+class SurfaceCapturingContextFactory {
+ public:
+  virtual ~SurfaceCapturingContextFactory() {}
+
+  // Creates a SurfaceCapturer that captures frames from the given compositor's
+  // current output surface.
+  virtual scoped_ptr<SurfaceCapturer> CreateOutputSurfaceCapturer(
+      ui::Compositor* compositor,
+      SurfaceCapturer::Client* client) = 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
@@ -60,6 +77,11 @@ class ImageTransportFactory {
   // Gets the image transport factory as a context factory for the compositor.
   virtual ui::ContextFactory* AsContextFactory() = 0;
 
+  // Gets the image transport factory as a surface capturer factory for the
+  // compositor.
+  virtual SurfaceCapturingContextFactory*
+      AsSurfaceCapturingContextFactory() = 0;
+
   // Creates a shared surface handle.
   // Note: the handle may get lost at any time, a state that an
   // ImageTransportFactoryObserver gets notified of.