add the replace attribute in location for hooking in beforeEach

vuejs#1090

Author: wanyaxing

src/history/hash.js

@@ -55,6 +55,12 @@ export class HashHistory extends History {
 
   replace (location: RawLocation, onComplete?: Function, onAbort?: Function) {
     const { current: fromRoute } = this
+    if (typeof location === 'string'){
+      location = {path:location}
+    }
+    if (typeof location === 'object' && !location.replace){
+      location.replace = 1
+    }
     this.transitionTo(location, route => {
       replaceHash(route.fullPath)
       handleScroll(this.router, route, fromRoute, false)

src/history/html5.js

@@ -52,6 +52,12 @@ export class HTML5History extends History {
 
   replace (location: RawLocation, onComplete?: Function, onAbort?: Function) {
     const { current: fromRoute } = this
+    if (typeof location === 'string'){
+      location = {path:location}
+    }
+    if (typeof location === 'object' && !location.replace){
+      location.replace = 1
+    }
     this.transitionTo(location, route => {
       replaceState(cleanPath(this.base + route.fullPath))
       handleScroll(this.router, route, fromRoute, false)

src/util/route.js

@@ -23,6 +23,7 @@ export function createRoute (
     meta: (record && record.meta) || {},
     path: location.path || '/',
     hash: location.hash || '',
+    replace: location.replace || 0,
     query,
     params: location.params || {},
     fullPath: getFullPath(location, stringifyQuery),