Remove the Page.setBlockedURLs method

This patch removes the Page.setBlockedURLs method. The
functionality is trivially implementable with the request
interception (see examples/loadurlwithoutcss.js).

Fixes #1.

docs/api.md

@@ -7,7 +7,6 @@
     - [browser.version()](#browserversion)
     - [browser.close()](#browserclose)
 - [class: Page](#class-page)
-    - [page.setBlockedURLs(patterns)](#pagesetblockedurlspatterns)
     - [page.addScriptTag(url)](#pageaddscripttagurl)
     - [page.injectFile(filePath)](#pageinjectfilefilepath)
     - [page.setInPageCallback(name, callback)](#pagesetinpagecallbackname-callback)
@@ -75,11 +74,6 @@ browser.newPage().then(page => {
 ```
 Pages could be closed by `page.close()` method.
 
-#### page.setBlockedURLs(patterns)
-
-- `patterns` [<Array>](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array)
-- returns: [<Promise>](https://developer.mozilla.org/en/docs/Web/JavaScript/Reference/Global_Objects/Promise) Promise which resolves when blocked URLs have been successfully set.
-
 #### page.addScriptTag(url)
 
 - `url` [<string>](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Data_structures#String_type) Url of a script to be added

examples/loadurlwithoutcss.js

@@ -25,7 +25,12 @@ var address = process.argv[2];
 
 var browser = new Browser({headless: false});
 browser.newPage().then(async page => {
-    await page.setBlockedURLs(['*.css']);
+    page.setRequestInterceptor(request => {
+        if (request.url().endsWith('.css'))
+            request.abort();
+        else
+            request.continue();
+    });
     var success = await page.navigate(address);
     if (!success)
         console.log('Unable to load the address!');

lib/Page.js

@@ -55,8 +55,6 @@ class Page extends EventEmitter {
         this._sourceURLToPageCallback = new Map();
         /** @type {!Map<string, !InPageCallback>} */
         this._scriptIdToPageCallback = new Map();
-        /** @type {!Array<string>} */
-        this._blockedURLs = [];
         /** @type {?function(!Request)} */
         this._requestInterceptor = null;
 
@@ -86,17 +84,6 @@ class Page extends EventEmitter {
         this._requestInterceptor(request);
     }
 
-    /**
-     * @param {!Array<string>} patterns
-     * @return {!Promise}
-     */
-    async setBlockedURLs(patterns) {
-        this._blockedURLs = patterns;
-        await this._client.send('Network.setBlockedURLs', {
-            urls: patterns
-        });
-    }
-
     /**
      * @param {string} url
      * @return {!Promise}