renamed variable

lib/single-file/frame-tree.js

@@ -80,8 +80,8 @@ this.frameTree = this.frameTree || (() => {
 					frameData.canvasData = messageFrameData.canvasData;
 					frameData.processed = messageFrameData.processed;
 				});
-				const pendingCount = windowData.frames.filter(frameData => !frameData.processed).length;
-				if (!pendingCount) {
+				const remainingFrames = windowData.frames.filter(frameData => !frameData.processed).length;
+				if (!remainingFrames) {
 					sessions.delete(message.sessionId);
 					windowData.resolve(windowData.frames.sort((frame1, frame2) => frame2.windowId.split(".").length - frame1.windowId.split(".").length));
 				}