DevTools: support cookies protocol methods with network service

Also added a test to detect the case when cookie CRUD protocol methods
operate on different cookie storage with regards to the network layer.

Bug: 721408
Change-Id: If81d4b2c1e13d69289e6dc006aabf9879fa80b11
Reviewed-on: https://chromium-review.googlesource.com/985246
Commit-Queue: Andrey Kosyakov <caseq@chromium.org>
Reviewed-by: Dmitry Gozman <dgozman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#546721}

third_party/WebKit/LayoutTests/http/tests/inspector-protocol/cookies-protocol-test-expected.txt

@@ -162,3 +162,14 @@ name: cookie1, value: привет, domain: .chromium.org, path: /path, session
 
 Running test: deleteAllCookies
 
+Running test: setCookieViaFetch
+Num of cookies 1
+name: name, value: value, domain: 127.0.0.1, path: /inspector-protocol/network/resources, session
+
+Running test: deleteAllCookies
+
+Running test: printCookieViaFetch
+Cookies as seen on server: "HTTP_COOKIE: foo=bar1\n"
+
+Running test: deleteAllCookies
+

third_party/WebKit/LayoutTests/http/tests/inspector-protocol/cookies-protocol-test.js

@@ -52,6 +52,27 @@
     await Promise.all(promises);
   }
 
+  async function setCookieViaFetch() {
+    await dp.Runtime.evaluate({
+        expression: `fetch('/inspector-protocol/network/resources/cookie.pl', { credentials: 'same-origin' })`,
+        awaitPromise: true
+    });
+    await logCookies();
+  }
+
+  async function printCookieViaFetch() {
+    await dp.Network.setCookie({url: 'http://127.0.0.1/', name: 'foo', value: 'bar1'});
+    const body = (await dp.Runtime.evaluate({
+        expression: `
+            fetch('/inspector-protocol/network/resources/echo-headers.php?headers=HTTP_COOKIE',
+                { credentials: 'same-origin' })
+            .then(r => r.text())`,
+        awaitPromise: true,
+        returnByValue: true
+    })).result.result.value;
+    testRunner.log(`Cookies as seen on server: ${JSON.stringify(body)}`);
+  }
+
   testRunner.log('Test started');
   testRunner.log('Enabling network');
   await dp.Network.enable();
@@ -180,5 +201,12 @@
 
     deleteAllCookies,
 
+    setCookieViaFetch,
+
+    deleteAllCookies,
+
+    printCookieViaFetch,
+
+    deleteAllCookies,
   ]);
 })