VrShell background implemented in JS.

chrome/browser/android/vr_shell/vr_math.h

Index: chrome/browser/android/vr_shell/vr_math.h
diff --git a/chrome/browser/android/vr_shell/vr_math.h b/chrome/browser/android/vr_shell/vr_math.h
index 7073d7445b597c023df8be946fec2f256ff4aa92..c5e031bf2eddbb62b244372bed71d86823db0332 100644
--- a/chrome/browser/android/vr_shell/vr_math.h
+++ b/chrome/browser/android/vr_shell/vr_math.h
@@ -34,6 +34,13 @@ typedef struct RotationAxisAngle {
   float angle;
 } RotationAxisAngle;
 
+typedef struct Colorf {

[cjgrant, 2017/02/01 14:36:40]

Is there a GL or gfx:: struct we could use instead, or do you prefer not?

[tiborg1, 2017/02/01 20:38:58]

So, gfx uses SkColor, which is a 32 bit integer. This would make the parsing and
the passing to GL a bit more difficult. Do you think it's worth it? There is no
GL struct that I know of.

+  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);