[vr] Add incognito coloring

chrome/browser/android/vr_shell/color_scheme.h

Index: chrome/browser/android/vr_shell/color_scheme.h
diff --git a/chrome/browser/android/vr_shell/color_scheme.h b/chrome/browser/android/vr_shell/color_scheme.h
index 76bb780132da326689e5dbe8e0ac0d7bebf6985c..d54a75cdd0717a433a3532f437031a0ffe9aec81 100644
--- a/chrome/browser/android/vr_shell/color_scheme.h
+++ b/chrome/browser/android/vr_shell/color_scheme.h
@@ -10,10 +10,10 @@
 namespace vr_shell {
 
 struct ColorScheme {
-  // TODO(vollick): Add support for incognito.
   enum Mode : int {
     kModeNormal = 0,
     kModeFullscreen,
+    kModeIncognito,
     kNumModes,
   };
 
@@ -25,6 +25,26 @@ struct ColorScheme {
   SkColor floor;
   SkColor ceiling;
   SkColor floor_grid;
+
+  // The foreground color is used for text and sometimes for icons.
+  SkColor foreground;
+  SkColor emphasized;
+  SkColor deemphasized;
+
+  // This is the background color. To be used behind text in the foreground
+  // color. The related hover and down colors are to be used for buttons.
+  SkColor background;
+  SkColor background_hover;
+  SkColor background_down;
+
+  // If you have a segmented element, its separators should use this color.
+  SkColor separator;
+
+  // Some content changes color based on the security level. Those visuals
+  // should respect these colors.
+  SkColor secure;
+  SkColor insecure;
+  SkColor warning;
 };
 
 }  // namespace vr_shell