Adding drawable to CRD andorid and iOS gl rendering pipeline.

remoting/client/gl_cursor.h

Index: remoting/client/gl_cursor.h
diff --git a/remoting/client/gl_cursor.h b/remoting/client/gl_cursor.h
index 365b2c23d7bf4242d78cdf295243c0c5fed58067..c1b5d3adc2cabf24b517f7e97efe4480d8ccccf9 100644
--- a/remoting/client/gl_cursor.h
+++ b/remoting/client/gl_cursor.h
@@ -10,6 +10,8 @@
 #include <memory>
 
 #include "base/macros.h"
+#include "base/memory/weak_ptr.h"
+#include "remoting/client/gl_drawable.h"
 
 namespace remoting {
 
@@ -21,10 +23,10 @@ class GlCanvas;
 class GlRenderLayer;
 
 // This class draws the cursor on the canvas.
-class GlCursor {
+class GlCursor : public GlDrawable {
  public:
   GlCursor();
-  ~GlCursor();
+  ~GlCursor() override;
 
   void SetCursorShape(const protocol::CursorShapeInfo& cursor_shape);
 
@@ -38,9 +40,10 @@ class GlCursor {
   // Sets the canvas on which the cursor will be drawn. Resumes the current
   // state of the cursor to the context of the new canvas.
   // If |canvas| is nullptr, nothing will happen when calling Draw().
-  void SetCanvas(GlCanvas* canvas);
+  void SetCanvas(GlCanvas* canvas) override;
 
-  void Draw();
+  bool Draw() override;
+  base::WeakPtr<GlDrawable> GetWeakPtr() override;
 
  private:
   void SetCurrentCursorShape(bool size_changed);
@@ -59,6 +62,8 @@ class GlCursor {
   float cursor_x_ = 0;
   float cursor_y_ = 0;
 
+  base::WeakPtrFactory<GlDrawable> weak_factory_;
+
   DISALLOW_COPY_AND_ASSIGN(GlCursor);
 };