Implement OverlayPanels as SceneOverlays

chrome/browser/android/compositor/scene_layer/reader_mode_scene_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_SCENE_LAYER_READER_MODE_SCENE_LAYER_H_
 #define CHROME_BROWSER_ANDROID_COMPOSITOR_SCENE_LAYER_READER_MODE_SCENE_LAYER_H_
 
 #include <memory>
 #include <vector>
 
 #include "base/android/jni_android.h"
 #include "base/android/jni_weak_ref.h"
 #include "base/android/scoped_java_ref.h"
 #include "base/macros.h"
 #include "chrome/browser/android/compositor/scene_layer/scene_layer.h"
 #include "ui/android/resources/resource_manager_impl.h"
 
+namespace cc {
+class Layer;
+class SolidColorLayer;
+}
+
 namespace chrome {
 namespace android {
 
 class ReaderModeLayer;
 
 class ReaderModeSceneLayer : public SceneLayer {
  public:
   ReaderModeSceneLayer(JNIEnv* env, jobject jobj);
   ~ReaderModeSceneLayer() override;
 
   void CreateReaderModeLayer(
       JNIEnv* env,
       const base::android::JavaParamRef<jobject>& object,
       const base::android::JavaParamRef<jobject>& jresource_manager);
 
   void SetResourceIds(
       JNIEnv* env,
       const base::android::JavaParamRef<jobject>& object,
       jint text_resource_id,
       jint bar_background_resource_id,
       jint bar_shadow_resource_id,
       jint panel_icon_resource_id,
       jint close_icon_resource_id);
 
   void Update(
       JNIEnv* env,
       const base::android::JavaParamRef<jobject>& object,
       jfloat dp_to_px,
+      jfloat base_page_brightness,
+      jfloat base_page_offset,
       const base::android::JavaParamRef<jobject>& jcontent_view_core,
       jfloat panel_X,
       jfloat panel_y,
       jfloat panel_width,
       jfloat panel_height,
       jfloat bar_margin_side,
       jfloat bar_height,
       jfloat text_opacity,
       jboolean bar_border_visible,
       jfloat bar_border_height,
       jboolean bar_shadow_visible,
       jfloat bar_shadow_opacity);
 
+  void SetContentTree(
+      JNIEnv* env,
+      const base::android::JavaParamRef<jobject>& jobj,
+      const base::android::JavaParamRef<jobject>& jcontent_tree);
+
+  void HideTree(
+      JNIEnv* env,
+      const base::android::JavaParamRef<jobject>& jobj);
+
  private:
+  float base_page_brightness_;
+
+  scoped_refptr<cc::Layer> content_layer_;
   scoped_refptr<ReaderModeLayer> reader_mode_layer_;
+  scoped_refptr<cc::SolidColorLayer> color_overlay_;
+  scoped_refptr<cc::Layer> content_container_;
 
   DISALLOW_COPY_AND_ASSIGN(ReaderModeSceneLayer);
 };
 
 bool RegisterReaderModeSceneLayer(JNIEnv* env);
 
 }  // namespace android
 }  // namespace chrome
 
 #endif  // CHROME_BROWSER_ANDROID_COMPOSITOR_SCENE_LAYER_READER_MODE_SCENE_LAYER_H_