Change how the VR reticle distance is determined.

chrome/browser/android/vr_shell/ui_scene.h

Index: chrome/browser/android/vr_shell/ui_scene.h
diff --git a/chrome/browser/android/vr_shell/ui_scene.h b/chrome/browser/android/vr_shell/ui_scene.h
index 1b1686f25792213d404326da71f191d3620e5cfa..3ef5eec10c8ec9b0231d7265660093f8392f299e 100644
--- a/chrome/browser/android/vr_shell/ui_scene.h
+++ b/chrome/browser/android/vr_shell/ui_scene.h
@@ -71,9 +71,8 @@ class UiScene {
 
   ContentRectangle* GetUiElementById(int element_id);
 
-  ContentRectangle* GetContentQuad();
-
   const Colorf& GetBackgroundColor();
+  float GetBackgroundDistance();
 
  private:
   void ApplyRecursiveTransforms(const ContentRectangle& element,
@@ -85,6 +84,7 @@ class UiScene {
   std::vector<std::unique_ptr<ContentRectangle>> ui_elements_;
   ContentRectangle* content_element_ = nullptr;
   Colorf background_color_ = {0.1f, 0.1f, 0.1f, 1.0f};
+  float background_distance_ = 10.0f;

[cjgrant, 2017/02/16 22:53:39]

This feels magic-number-ish, but to put a constant into an empty namespace, it
needs to be done in the .cc constructor (which is currently default).  Good
times.

 
   DISALLOW_COPY_AND_ASSIGN(UiScene);
 };