Adding drawable to CRD andorid and iOS gl rendering pipeline.

remoting/client/display/fake_canvas.h

Index: remoting/client/display/fake_canvas.h
diff --git a/remoting/client/display/fake_canvas.h b/remoting/client/display/fake_canvas.h
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index 0000000000000000000000000000000000000000..036091fb0d2a1f4b06e549fb262e757f540fe330
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+++ b/remoting/client/display/fake_canvas.h
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+// Copyright 2016 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_DISPLAY_FAKE_CANVAS_H_
+#define REMOTING_CLIENT_DISPLAY_FAKE_CANVAS_H_
+
+#include <array>
+
+#include "base/macros.h"
+#include "base/threading/thread_checker.h"
+#include "remoting/client/display/gl_canvas.h"
+#include "remoting/client/display/sys_opengl.h"
+
+namespace remoting {
+
+class FakeCanvas : public Canvas {
+ public:
+  FakeCanvas();
+  ~FakeCanvas() override;
+
+  // Drawable implementation.
+  void Clear() override;
+  void SetTransformationMatrix(const std::array<float, 9>& matrix) override;
+  void SetViewSize(int width, int height) override;
+  void DrawTexture(int texture_id,
+                   int texture_handle,
+                   int vertex_buffer,
+                   float alpha_multiplier) override;
+  int GetVersion() const override;
+  int GetMaxTextureSize() const override;
+  base::WeakPtr<Canvas> GetWeakPtr() override;
+
+ private:
+  base::ThreadChecker thread_checker_;
+  base::WeakPtrFactory<Canvas> weak_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(FakeCanvas);
+};
+
+}  // namespace remoting
+
+#endif  // REMOTING_CLIENT_DISPLAY_FAKE_CANVAS_H_