[VrShell] Centralize color handling and enable close button on fullscreen

chrome/browser/android/vr_shell/textures/url_bar_texture.h

 // Copyright 2017 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_TEXTURES_URL_BAR_TEXTURE_H_
 #define CHROME_BROWSER_ANDROID_VR_SHELL_TEXTURES_URL_BAR_TEXTURE_H_
 
 #include <memory>
 #include <vector>
 
@@ skipping 43 matching lines @@
                               security_state::SecurityLevel security_level,
                               vr_shell::RenderTextWrapper* render_text,
                               const ColorScheme& color_scheme);
 
  private:
   void Draw(SkCanvas* canvas, const gfx::Size& texture_size) override;
   float ToPixels(float meters) const;
   bool HitsTransparentRegion(const gfx::PointF& meters, bool left) const;
   void RenderUrl(const gfx::Size& texture_size, const gfx::Rect& bounds);
   void OnSetMode() override;
-  const ColorScheme& color_scheme() const;
 
   gfx::SizeF size_;
   bool hovered_ = false;
   bool pressed_ = false;
   bool can_go_back_ = false;
 
   GURL gurl_;
   security_state::SecurityLevel security_level_;
 
   std::unique_ptr<gfx::RenderText> url_render_text_;
   GURL last_drawn_gurl_;
   security_state::SecurityLevel last_drawn_security_level_;
   base::Callback<void(UiUnsupportedMode)> failure_callback_;
 
   DISALLOW_COPY_AND_ASSIGN(UrlBarTexture);
 };
 
 }  // namespace vr_shell
 
 #endif  // CHROME_BROWSER_ANDROID_VR_SHELL_TEXTURES_URL_BAR_TEXTURE_H_