Adding the iOS app and integration example with GlRenderer.

remoting/client/ios/display/gl_demo_screen.h

Index: remoting/client/ios/display/gl_demo_screen.h
diff --git a/remoting/client/ios/display/gl_demo_screen.h b/remoting/client/ios/display/gl_demo_screen.h
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index 0000000000000000000000000000000000000000..e522bbd16dfab4a5ee1a6b77f7bb358fbdcc0c28
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+++ b/remoting/client/ios/display/gl_demo_screen.h
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+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef REMOTING_CLIENT_IOS_DISPLAY_GL_DEMO_SCREEN_H_
+#define REMOTING_CLIENT_IOS_DISPLAY_GL_DEMO_SCREEN_H_
+
+#include "base/macros.h"
+#include "base/threading/thread_checker.h"
+#include "remoting/client/display/drawable.h"
+#include "remoting/client/display/sys_opengl.h"
+
+namespace remoting {
+
+// This class draws the desktop on the canvas.
+class GlDemoScreen : public Drawable {
+ public:
+  GlDemoScreen();
+  ~GlDemoScreen() override;
+
+  // Drawable implementation.
+  void SetCanvas(base::WeakPtr<Canvas> canvas) override;
+  bool Draw() override;
+  base::WeakPtr<Drawable> GetWeakPtr() override;
+  int GetZIndex() override;
+
+ private:
+  base::WeakPtr<Canvas> canvas_;
+  int square_size_ = 0;
+  GLuint program_;
+
+  base::ThreadChecker thread_checker_;
+  base::WeakPtrFactory<Drawable> weak_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(GlDemoScreen);
+};
+
+}  // namespace remoting
+
+#endif  // REMOTING_CLIENT_IOS_DISPLAY_GL_DEMO_SCREEN_H_