Revert of Delete video_render module.

webrtc/modules/video_render/ios/open_gles20.h

Index: webrtc/modules/video_render/ios/open_gles20.h
diff --git a/webrtc/modules/video_render/ios/open_gles20.h b/webrtc/modules/video_render/ios/open_gles20.h
new file mode 100644
index 0000000000000000000000000000000000000000..880ddb5231f74f0eaa06265808d948880651895b
--- /dev/null
+++ b/webrtc/modules/video_render/ios/open_gles20.h
@@ -0,0 +1,64 @@
+/*
+ *  Copyright (c) 2013 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#ifndef WEBRTC_MODULES_VIDEO_RENDER_IOS_OPEN_GLES20_H_
+#define WEBRTC_MODULES_VIDEO_RENDER_IOS_OPEN_GLES20_H_
+
+#include <OpenGLES/ES2/glext.h>
+
+#include "webrtc/modules/video_render/video_render_defines.h"
+
+/*
+ * This OpenGles20 is the class of renderer for VideoFrame into a GLES 2.0
+ * windows used in the VideoRenderIosView class.
+ */
+namespace webrtc {
+class OpenGles20 {
+ public:
+  OpenGles20();
+  ~OpenGles20();
+
+  bool Setup(int32_t width, int32_t height);
+  bool Render(const VideoFrame& frame);
+
+  // SetCoordinates
+  // Sets the coordinates where the stream shall be rendered.
+  // Values must be between 0 and 1.
+  bool SetCoordinates(const float z_order,
+                      const float left,
+                      const float top,
+                      const float right,
+                      const float bottom);
+
+ private:
+  // Compile and load the vertex and fragment shaders defined at the top of
+  // open_gles20.mm
+  GLuint LoadShader(GLenum shader_type, const char* shader_source);
+
+  GLuint CreateProgram(const char* vertex_source, const char* fragment_source);
+
+  // Initialize the textures by the frame width and height
+  void SetupTextures(const VideoFrame& frame);
+
+  // Update the textures by the YUV data from the frame
+  void UpdateTextures(const VideoFrame& frame);
+
+  GLuint texture_ids_[3];  // Texture id of Y,U and V texture.
+  GLuint program_;
+  GLsizei texture_width_;
+  GLsizei texture_height_;
+
+  GLfloat vertices_[20];
+  static const char indices_[];
+  static const char vertext_shader_[];
+  static const char fragment_shader_[];
+};
+}  // namespace webrtc
+#endif  // WEBRTC_MODULES_VIDEO_RENDER_IOS_OPEN_GLES20_H_