VR: Soften the floor grid

chrome/browser/android/vr_shell/vr_shell_renderer.h

Index: chrome/browser/android/vr_shell/vr_shell_renderer.h
diff --git a/chrome/browser/android/vr_shell/vr_shell_renderer.h b/chrome/browser/android/vr_shell/vr_shell_renderer.h
index 5759fea43d1ca351f4300e1d96d6f026a10b7d9f..a8e0d028aa1e25b00b17fc58cdc6aced98824d01 100644
--- a/chrome/browser/android/vr_shell/vr_shell_renderer.h
+++ b/chrome/browser/android/vr_shell/vr_shell_renderer.h
@@ -247,7 +247,7 @@ class GradientQuadRenderer : public BaseQuadRenderer {
   DISALLOW_COPY_AND_ASSIGN(GradientQuadRenderer);
 };
 
-class GradientGridRenderer : public BaseRenderer {
+class GradientGridRenderer : public BaseQuadRenderer {
  public:
   GradientGridRenderer();
   ~GradientGridRenderer() override;
@@ -255,19 +255,18 @@ class GradientGridRenderer : public BaseRenderer {
   void Draw(const vr::Mat4f& view_proj_matrix,
             SkColor edge_color,
             SkColor center_color,
+            SkColor grid_color,
             int gridline_count,
             float opacity);
 
  private:
-  void MakeGridLines(int gridline_count);
-
-  GLuint vertex_buffer_ = 0;
   GLuint model_view_proj_matrix_handle_;
   GLuint scene_radius_handle_;
   GLuint center_color_handle_;
   GLuint edge_color_handle_;
+  GLuint grid_color_handle_;
   GLuint opacity_handle_;
-  std::vector<Line3d> grid_lines_;
+  GLuint lines_count_handle_;
 
   DISALLOW_COPY_AND_ASSIGN(GradientGridRenderer);
 };