Fix request interception corner cases (#261)

This patch:
- teaches request interception to ignore data URLs. Currently protocol
  doesn't send interceptions for data URLs.
- teaches request interception to properly process URLs with hashes.
  Currently `Network.requestIntercepted` sends url with a hash, whereas
  `Network.requestWillBeSent` doesn't report hashes in its urls. @see
  crbug.com/755456
- skips one more header that I spotted during debugging interception on
  the realworld websites.

Fixes #258, #259.

test/test.js

@@ -518,7 +518,7 @@ describe('Page', function() {
     }));
   });
 
-  describe('Page.navigate', function() {
+  describe('Page.goto', function() {
     it('should navigate to about:blank', SX(async function() {
       let response = await page.goto('about:blank');
       expect(response).toBe(null);
@@ -690,6 +690,24 @@ describe('Page', function() {
       process.removeListener('warning', warningHandler);
       expect(warning).toBe(null);
     }));
+    it('should navigate to dataURL and fire dataURL requests', SX(async function() {
+      let requests = [];
+      page.on('request', request => requests.push(request));
+      let dataURL = 'data:text/html,<div>yo</div>';
+      let response = await page.goto(dataURL);
+      expect(response.status).toBe(200);
+      expect(requests.length).toBe(1);
+      expect(requests[0].url).toBe(dataURL);
+    }));
+    it('should navigate to URL with hash and fire requests without hash', SX(async function() {
+      let requests = [];
+      page.on('request', request => requests.push(request));
+      let response = await page.goto(EMPTY_PAGE + '#hash');
+      expect(response.status).toBe(200);
+      expect(response.url).toBe(EMPTY_PAGE);
+      expect(requests.length).toBe(1);
+      expect(requests[0].url).toBe(EMPTY_PAGE);
+    }));
   });
 
   describe('Page.waitForNavigation', function() {
@@ -871,6 +889,32 @@ describe('Page', function() {
       ]));
       expect(results).toEqual(['11', 'FAILED', '22']);
     }));
+    it('should navigate to dataURL and fire dataURL requests', SX(async function() {
+      await page.setRequestInterceptionEnabled(true);
+      let requests = [];
+      page.on('request', request => {
+        requests.push(request);
+        request.continue();
+      });
+      let dataURL = 'data:text/html,<div>yo</div>';
+      let response = await page.goto(dataURL);
+      expect(response.status).toBe(200);
+      expect(requests.length).toBe(1);
+      expect(requests[0].url).toBe(dataURL);
+    }));
+    it('should navigate to URL with hash and and fire requests without hash', SX(async function() {
+      await page.setRequestInterceptionEnabled(true);
+      let requests = [];
+      page.on('request', request => {
+        requests.push(request);
+        request.continue();
+      });
+      let response = await page.goto(EMPTY_PAGE + '#hash');
+      expect(response.status).toBe(200);
+      expect(response.url).toBe(EMPTY_PAGE);
+      expect(requests.length).toBe(1);
+      expect(requests[0].url).toBe(EMPTY_PAGE);
+    }));
   });
 
   describe('Page.Events.Dialog', function() {