Remove ContentViewCore dependency from OverlayPanel

chrome/browser/android/compositor/layer/reader_mode_layer.h

 // Copyright 2016 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_LAYER_READER_MODE_LAYER_H_
 #define CHROME_BROWSER_ANDROID_COMPOSITOR_LAYER_READER_MODE_LAYER_H_
 
 #include <memory>
 
 #include "chrome/browser/android/compositor/layer/overlay_panel_layer.h"
 
-namespace content {
-class ContentViewCore;
+namespace cc {
+class Layer;
 }
 
 namespace ui {
 class ResourceManager;
 }
 
 namespace chrome {
 namespace android {
 
 class ReaderModeLayer : public OverlayPanelLayer {
  public:
   static scoped_refptr<ReaderModeLayer> Create(
       ui::ResourceManager* resource_manager);
 
   void SetProperties(float dp_to_px,
-                     content::ContentViewCore* content_view_core,
+                     const scoped_refptr<cc::Layer>& content_layer,
                      float panel_x,
                      float panel_y,
                      float panel_width,
                      float panel_height,
                      float bar_margin_side,
                      float bar_height,
                      float text_opacity,
                      bool bar_border_visible,
                      float bar_border_height,
                      bool bar_shadow_visible,
                      float bar_shadow_opacity);
 
  protected:
   explicit ReaderModeLayer(ui::ResourceManager* resource_manager);
   ~ReaderModeLayer() override;
 };
 
 }  //  namespace android
 }  //  namespace chrome
 
 #endif  // CHROME_BROWSER_ANDROID_COMPOSITOR_LAYER_READER_MODE_LAYER_H_