ui: Add ScheduleOverlayPlane API to GLImage.

ui/gl/gl_image.h

Index: ui/gl/gl_image.h
diff --git a/ui/gl/gl_image.h b/ui/gl/gl_image.h
index 45303fd64602321259973a4090478e645390ca37..4b1e9da3786d869083f19ccc5dd45539a4fbec1d 100644
--- a/ui/gl/gl_image.h
+++ b/ui/gl/gl_image.h
@@ -6,6 +6,9 @@
 #define UI_GL_GL_IMAGE_H_
 
 #include "base/memory/ref_counted.h"
+#include "ui/gfx/overlay_transform.h"
+#include "ui/gfx/rect.h"
+#include "ui/gfx/rect_f.h"
 #include "ui/gfx/size.h"
 #include "ui/gl/gl_export.h"
 
@@ -41,6 +44,20 @@ class GL_EXPORT GLImage : public base::RefCounted<GLImage> {
   // Called after the texture image data has been modified.
   virtual void DidModifyTexImage() = 0;
 
+  // Schedule image as an overlay plane to be shown at swap time.
+  // |z_order| specifies the stacking order of the plane relative to the
+  // main framebuffer located at index 0. For the case where there is no
+  // main framebuffer, overlays may be scheduled at 0, taking its place.
+  // |transform| specifies how the buffer is to be transformed during
+  // composition.
+  // |bounds_rect| specify where it is supposed to be on the screen in pixels.
+  // |crop_rect| specifies the region within the buffer to be placed inside
+  // |bounds_rect|.
+  virtual bool ScheduleOverlayPlane(int z_order,
+                                    OverlayTransform transform,
+                                    const Rect& bounds_rect,
+                                    const RectF& crop_rect) = 0;
+
   // Indicate that image should be released after use.
   // (For an Android work-around only).
   virtual void SetReleaseAfterUse();