VrShell background implemented in JS.

chrome/browser/android/vr_shell/vr_math.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_MATH_H_
 #define CHROME_BROWSER_ANDROID_VR_SHELL_VR_MATH_H_
 
 #include <array>
 
 #include "third_party/gvr-android-sdk/src/libraries/headers/vr/gvr/capi/include/gvr_types.h"
@@ skipping 16 matching lines @@
   float height;
 } Rectf;
 
 typedef struct RotationAxisAngle {
   float x;
   float y;
   float z;
   float angle;
 } RotationAxisAngle;
 
+typedef struct Colorf {
+  float r;
+  float g;
+  float b;
+  float a;
+} Colorf;
+
 void SetIdentityM(gvr::Mat4f& mat);
 
 void TranslateM(gvr::Mat4f& tmat, gvr::Mat4f& mat, float x, float y, float z);
 void TranslateMRight(gvr::Mat4f& tmat,
                      gvr::Mat4f& mat,
                      float x,
                      float y,
                      float z);
 
 void ScaleM(gvr::Mat4f& tmat, const gvr::Mat4f& mat, float x, float y, float z);
@@ skipping 34 matching lines @@
 
 gvr::Quatf QuatFromAxisAngle(const gvr::Vec3f& axis, float angle);
 
 gvr::Vec3f GetRayPoint(const gvr::Vec3f& rayOrigin,
                        const gvr::Vec3f& rayVector,
                        float scale);
 
 }  // namespace vr_shell
 
 #endif  // CHROME_BROWSER_ANDROID_VR_SHELL_VR_MATH_H_