Toolbar is a root layer for the UI compositor

chrome/browser/android/compositor/scene_layer/static_tab_scene_layer.h

 // Copyright 2015 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_COMPOSITOR_SCENE_LAYER_STATIC_TAB_SCENE_LAYER_H_
 #define CHROME_BROWSER_ANDROID_COMPOSITOR_SCENE_LAYER_STATIC_TAB_SCENE_LAYER_H_
 
 #include <jni.h>
 
 #include <memory>
@@ skipping 41 matching lines @@
       jboolean can_use_live_layer,
       jint default_background_color,
       jfloat x,
       jfloat y,
       jfloat width,
       jfloat height,
       jfloat content_offset_y,
       jfloat static_to_view_blend,
       jfloat saturation,
       jfloat brightness);
-  // Update the compositor version of the toolbar.
-  void UpdateToolbarLayer(
-      JNIEnv* env,
-      const base::android::JavaParamRef<jobject>& object,
-      const base::android::JavaParamRef<jobject>& jresource_manager,
-      jint toolbar_resource_id,
-      jint toolbar_background_color,
-      jint url_bar_resource_id,
-      jfloat url_bar_alpha,
-      jfloat top_offset,
-      bool visible,
-      bool show_shadow);
-  // Update the progress bar.
-  void UpdateProgressBar(
-      JNIEnv* env,
-      const base::android::JavaParamRef<jobject>& object,
-      jint progress_bar_x,
-      jint progress_bar_y,
-      jint progress_bar_width,
-      jint progress_bar_height,
-      jint progress_bar_color,
-      jint progress_bar_background_x,
-      jint progress_bar_background_y,
-      jint progress_bar_background_width,
-      jint progress_bar_background_height,
-      jint progress_bar_background_color);
 
  private:
   scoped_refptr<chrome::android::ContentLayer> content_layer_;
   scoped_refptr<cc::Layer> content_scene_layer_;
-  scoped_refptr<ToolbarLayer> toolbar_layer_;
 
   int last_set_tab_id_;
   int background_color_;
   float brightness_;
 
   DISALLOW_COPY_AND_ASSIGN(StaticTabSceneLayer);
 };
 
 bool RegisterStaticTabSceneLayer(JNIEnv* env);
 
 }  // namespace android
 }  // namespace chrome
 
 #endif  // CHROME_BROWSER_ANDROID_COMPOSITOR_SCENE_LAYER_STATIC_TAB_SCENE_LAYER_H_