Adding drawable to CRD andorid and iOS gl rendering pipeline.

remoting/client/gl_cursor_feedback.h

Index: remoting/client/gl_cursor_feedback.h
diff --git a/remoting/client/gl_cursor_feedback.h b/remoting/client/gl_cursor_feedback.h
index 6405efcee7dc4c92be956b0d89bbda5c8271ad7b..64d35d78c4d0b69cc869bc4005e4fed554b8dfbe 100644
--- a/remoting/client/gl_cursor_feedback.h
+++ b/remoting/client/gl_cursor_feedback.h
@@ -10,7 +10,9 @@
 #include <memory>
 
 #include "base/macros.h"
+#include "base/memory/weak_ptr.h"
 #include "base/time/time.h"
+#include "remoting/client/gl_drawable.h"
 
 namespace remoting {
 
@@ -18,21 +20,23 @@ class GlCanvas;
 class GlRenderLayer;
 
 // This class draws the cursor feedback on the canvas.
-class GlCursorFeedback {
+class GlCursorFeedback : public GlDrawable {
  public:
   GlCursorFeedback();
-  ~GlCursorFeedback();
+  ~GlCursorFeedback() override;
 
   // Sets the canvas on which the cursor feedback will be drawn. Resumes the
   // feedback texture 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 StartAnimation(float x, float y, float diameter);
 
   // Returns true if animation is not finished, false otherwise. Does nothing
   // if the animation has stopped.
-  bool Draw();
+  bool Draw() override;
+
+  base::WeakPtr<GlDrawable> GetWeakPtr() override;
 
  private:
   std::unique_ptr<GlRenderLayer> layer_;
@@ -41,6 +45,7 @@ class GlCursorFeedback {
   float cursor_y_ = 0;
   base::TimeTicks animation_start_time_;
 
+  base::WeakPtrFactory<GlDrawable> weak_factory_;
   DISALLOW_COPY_AND_ASSIGN(GlCursorFeedback);
 };