Adding drawable to CRD andorid and iOS gl rendering pipeline.

remoting/client/display/gl_render_layer.h

Index: remoting/client/display/gl_render_layer.h
diff --git a/remoting/client/display/gl_render_layer.h b/remoting/client/display/gl_render_layer.h
index 153e2e3e4644ab578d1feaadd7b076a3484235c9..155eef9905e2823eb5539b8156d5ae7d40a12109 100644
--- a/remoting/client/display/gl_render_layer.h
+++ b/remoting/client/display/gl_render_layer.h
@@ -13,7 +13,7 @@
 #include "remoting/client/display/sys_opengl.h"
 
 namespace remoting {
-class GlCanvas;
+class Canvas;
 
 // This class is for drawing a texture on the canvas. Must be deleted before the
 // canvas is deleted.
@@ -23,7 +23,7 @@ class GlRenderLayer {
 
   // texture_id: An integer in range [0, GL_MAX_TEXTURE_IMAGE_UNITS], defining
   //             which slot to store the texture.
-  GlRenderLayer(int texture_id, GlCanvas* canvas);
+  GlRenderLayer(int texture_id, Canvas* canvas);
   ~GlRenderLayer();
 
   // Sets the texture (RGBA 8888) to be drawn. Please use UpdateTexture() if the
@@ -78,7 +78,7 @@ class GlRenderLayer {
                                       bool* should_reset_row_length);
 
   int texture_id_;
-  GlCanvas* canvas_;
+  Canvas* canvas_;
 
   GLuint texture_handle_;
   GLuint buffer_handle_;