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

chrome/browser/android/vr_shell/vr_shell.h

Index: chrome/browser/android/vr_shell/vr_shell.h
diff --git a/chrome/browser/android/vr_shell/vr_shell.h b/chrome/browser/android/vr_shell/vr_shell.h
new file mode 100644
index 0000000000000000000000000000000000000000..4fcff02aca8e683e1b218bd9d2cd14a4118cbffa
--- /dev/null
+++ b/chrome/browser/android/vr_shell/vr_shell.h
@@ -0,0 +1,77 @@
+// 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_H_
+#define CHROME_BROWSER_ANDROID_VR_SHELL_VR_SHELL_H_
+
+#include <jni.h>
+#include <memory>
+
+#include "base/android/jni_weak_ref.h"
+#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 {
+
+class VrShellRenderer;
+
+class ContentRect {
+ public:
+  ContentRect();
+  ~ContentRect();
+  void SetIdentity();
+  void Translate(float x, float y, float z);
+  gvr::Mat4f transfrom_to_world;
+  int content_texture_handle;
+};
+
+class VrShell {
+ public:
+  VrShell(JNIEnv* env, jobject obj);
+
+  void Destroy(JNIEnv* env, const base::android::JavaParamRef<jobject>& obj);
+
+  void GvrInit(JNIEnv* env,
+               const base::android::JavaParamRef<jobject>& obj,
+               jlong native_gvr_api);
+  void InitializeGl(JNIEnv* env,
+                    const base::android::JavaParamRef<jobject>& obj,
+                    jint texture_data_handle);
+  void DrawFrame(JNIEnv* env, const base::android::JavaParamRef<jobject>& obj);
+  void OnPause(JNIEnv* env, const base::android::JavaParamRef<jobject>& obj);
+  void OnResume(JNIEnv* env, const base::android::JavaParamRef<jobject>& obj);
+
+ private:
+  ~VrShell();
+
+  void DrawEye(const gvr::Mat4f& view_matrix,
+               const gvr::BufferViewport& params);
+  void DrawContentRect();
+
+  std::unique_ptr<ContentRect> content_rect_;
+  std::unique_ptr<gvr::GvrApi> gvr_api_;
+  std::unique_ptr<gvr::BufferViewportList> buffer_viewport_list_;
+  std::unique_ptr<gvr::BufferViewport> buffer_viewport_;
+  std::unique_ptr<gvr::SwapChain> swap_chain_;
+
+  gvr::Mat4f view_matrix_;
+  gvr::Mat4f projection_matrix_;
+
+  gvr::Mat4f head_pose_;
+
+  gvr::Sizei render_size_;
+
+  std::unique_ptr<VrShellRenderer> vr_shell_renderer_;
+
+  base::android::ScopedJavaGlobalRef<jobject> j_vr_shell_;
+
+  DISALLOW_COPY_AND_ASSIGN(VrShell);
+};
+
+bool RegisterVrShell(JNIEnv* env);
+
+}  // namespace vr_shell
+
+#endif  // CHROME_BROWSER_ANDROID_VR_SHELL_VR_SHELL_H_