Make ol.control.OverviewMap's view configurable

This is useful for creating an OverviewMap in a different projection than
EPSG:3857.

externs/olx.js

@@ -1160,7 +1160,8 @@ olx.control.MousePositionOptions.prototype.undefinedHTML;
  *     layers: (Array.<ol.layer.Layer>|ol.Collection|undefined),
  *     render: (function(ol.MapEvent)|undefined),
  *     target: (Element|undefined),
- *     tipLabel: (string|undefined)}}
+ *     tipLabel: (string|undefined),
+ *     view: (ol.View|undefined)}}
  * @api
  */
 olx.control.OverviewMapOptions;
@@ -1236,6 +1237,15 @@ olx.control.OverviewMapOptions.prototype.target;
 olx.control.OverviewMapOptions.prototype.tipLabel;
 
 
+/**
+ * Custom view for the overview map. If not provided, a default view with
+ * an EPSG:3857 projection will be used.
+ * @type {ol.View|undefined}
+ * @api
+ */
+olx.control.OverviewMapOptions.prototype.view;
+
+
 /**
  * @typedef {{className: (string|undefined),
  *     minWidth: (number|undefined),
@@ -4241,7 +4251,7 @@ olx.source.ImageMapGuideOptions.prototype.projection;
 
 /**
  * Ratio. `1` means image requests are the size of the map viewport, `2` means
- * twice the width and height of the map viewport, and so on. Must be `1` or 
+ * twice the width and height of the map viewport, and so on. Must be `1` or
  * higher. Default is `1`.
  * @type {number|undefined}
  * @api stable
@@ -4524,7 +4534,7 @@ olx.source.ImageVectorOptions.prototype.projection;
 
 /**
  * Ratio. 1 means canvases are the size of the map viewport, 2 means twice the
- * width and height of the map viewport, and so on. Must be `1` or higher. 
+ * width and height of the map viewport, and so on. Must be `1` or higher.
  * Default is `1.5`.
  * @type {number|undefined}
  * @api
@@ -4708,7 +4718,7 @@ olx.source.ImageWMSOptions.prototype.projection;
 
 /**
  * Ratio. `1` means image requests are the size of the map viewport, `2` means
- * twice the width and height of the map viewport, and so on. Must be `1` or 
+ * twice the width and height of the map viewport, and so on. Must be `1` or
  * higher. Default is `1.5`.
  * @type {number|undefined}
  * @api stable

src/ol/control/overviewmapcontrol.js

@@ -99,7 +99,8 @@ ol.control.OverviewMap = function(opt_options) {
   this.ovmap_ = new ol.Map({
     controls: new ol.Collection(),
     interactions: new ol.Collection(),
-    target: ovmapDiv
+    target: ovmapDiv,
+    view: options.view
   });
   var ovmap = this.ovmap_;