Exposed Scale Manager via global reference

src/boot/Game.js

@@ -231,11 +231,11 @@ var Game = new Class({
          *
          * The Scale Manager is a global system responsible for handling game scaling events.
          *
-         * @name Phaser.Game#scaleManager
+         * @name Phaser.Game#scale
          * @type {Phaser.Boot.ScaleManager}
          * @since 3.15.0
          */
-        this.scaleManager = new ScaleManager(this, this.config);
+        this.scale = new ScaleManager(this, this.config);
 
         /**
          * An instance of the base Sound Manager.

src/scene/InjectionMap.js

@@ -22,6 +22,7 @@ var InjectionMap = {
     cache: 'cache',
     plugins: 'plugins',
     registry: 'registry',
+    scale: 'scale',
     sound: 'sound',
     textures: 'textures',
 

src/scene/Systems.js

@@ -148,6 +148,17 @@ var Systems = new Class({
          */
         this.registry;
 
+        /**
+         * A reference to the global Scale Manager.
+         * 
+         * In the default set-up you can access this from within a Scene via the `this.scale` property.
+         *
+         * @name Phaser.Scenes.Systems#scale
+         * @type {Phaser.DOM.ScaleManager}
+         * @since 3.15.0
+         */
+        this.scale;
+
         /**
          * A reference to the global Sound Manager.
          *