Introduce ChromeVR to Chrome on Android (behind a build flag)

chrome/browser/android/vr_shell/vr_shell_renderer.h

+// 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 CHROME_BROWSER_ANDROID_VR_SHELL_VR_SHELL_RENDERER_H_
+#define CHROME_BROWSER_ANDROID_VR_SHELL_VR_SHELL_RENDERER_H_
+
+#include <memory>
+#include <string>
+#include <vector>
+
+#include "base/macros.h"
+#include "third_party/gvr-android-sdk/src/ndk-beta/include/vr/gvr/capi/include/gvr.h"
+#include "third_party/gvr-android-sdk/src/ndk-beta/include/vr/gvr/capi/include/gvr_types.h"
+
+namespace vr_shell {
+
+typedef unsigned int GLuint;
+
+enum ShaderID {
+  SHADER_UNRECOGNIZED = 0,
+  TEXTURE_QUAD_VERTEX_SHADER,
+  TEXTURE_QUAD_FRAGMENT_SHADER,
+  SHADER_ID_MAX
+};
+
+class TexturedQuadRenderer {
+ public:
+  TexturedQuadRenderer();
+  ~TexturedQuadRenderer();
+
+  // Draw the content rect in the texture quad.
+  void Draw(int texture_data_handle, const gvr::Mat4f& combined_matrix);
+
+ private:
+  GLuint vertex_shader_handle_;
+  GLuint fragment_shader_handle_;
+  GLuint program_handle_;
+  GLuint combined_matrix_handle_;
+  GLuint texture_uniform_handle_;
+  GLuint position_handle_;
+  GLuint texture_coordinate_handle_;
+
+  DISALLOW_COPY_AND_ASSIGN(TexturedQuadRenderer);
+};
+
+class VrShellRenderer {
+ public:
+  VrShellRenderer();
+  ~VrShellRenderer();
+
+  TexturedQuadRenderer* GetTexturedQuadRenderer() {
+    return textured_quad_renderer_.get();
+  }
+
+ private:
+  std::unique_ptr<TexturedQuadRenderer> textured_quad_renderer_;
+  DISALLOW_COPY_AND_ASSIGN(VrShellRenderer);
+};
+
+}  // namespace vr_shell
+
+#endif  // CHROME_BROWSER_ANDROID_VR_SHELL_VR_SHELL_RENDERER_H_