Rename devicePixelRatio to pixelRatio in ol.FrameState

src/ol/renderer/webgl/webglimagelayerrenderer.js

@@ -118,7 +118,7 @@ ol.renderer.webgl.ImageLayer.prototype.prepareFrame =
 
   if (!hints[ol.ViewHint.ANIMATING] && !hints[ol.ViewHint.INTERACTING]) {
     var image_ = imageSource.getImage(frameState.extent, viewResolution,
-        frameState.devicePixelRatio, view2DState.projection);
+        frameState.pixelRatio, view2DState.projection);
     if (!goog.isNull(image_)) {
       var imageState = image_.getState();
       if (imageState == ol.ImageState.IDLE) {

src/ol/renderer/webgl/webgllayerrenderer.js

@@ -238,8 +238,7 @@ ol.renderer.webgl.Layer.prototype.dispatchComposeEvent_ =
     function(type, context, frameState) {
   var layer = this.getLayer();
   if (layer.hasListener(type)) {
-    var render = new ol.render.webgl.Immediate(context,
-        frameState.devicePixelRatio);
+    var render = new ol.render.webgl.Immediate(context, frameState.pixelRatio);
     var composeEvent = new ol.render.Event(
         type, layer, render, frameState, null, context);
     layer.dispatchEvent(composeEvent);

src/ol/renderer/webgl/webglmaprenderer.js

@@ -285,8 +285,7 @@ ol.renderer.webgl.Map.prototype.dispatchComposeEvent_ =
   var map = this.getMap();
   if (map.hasListener(type)) {
     var context = this.getContext();
-    var render = new ol.render.webgl.Immediate(context,
-        frameState.devicePixelRatio);
+    var render = new ol.render.webgl.Immediate(context, frameState.pixelRatio);
     var composeEvent = new ol.render.Event(
         type, map, render, frameState, null, context);
     map.dispatchEvent(composeEvent);