Revert "Add docs traffic from DevTools must include utm_medium=referral."

This reverts commit 6e4e34a.

Reason for revert: Analytics found a better solution that doesn't require adding the `utm_medium` tracking parameter to all outgoing links.

Original change's description:
> Add docs traffic from DevTools must include `utm_medium=referral`.
>
> This ensures that we also pass `utm_medium` correctly.
>
> Fixed: 416414182
> Bug: 402611137
> Change-Id: Id6945c55df97396072cbe3004c0e745e55f33be9
> Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/6519593
> Reviewed-by: Kim-Anh Tran <kimanh@chromium.org>
> Commit-Queue: Kim-Anh Tran <kimanh@chromium.org>
> Auto-Submit: Benedikt Meurer <bmeurer@chromium.org>

Bug: 402611137, 416414182
Change-Id: Ibf91bdf04fa4313e1172bbb1411188d21bbd02a4
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/6549742
Reviewed-by: Kim-Anh Tran <kimanh@chromium.org>
Commit-Queue: Benedikt Meurer <bmeurer@chromium.org>
Auto-Submit: Benedikt Meurer <bmeurer@chromium.org>
Commit-Queue: Kim-Anh Tran <kimanh@chromium.org>

Author: bmeurer

front_end/ui/legacy/UIUtils.test.ts

@@ -3,11 +3,14 @@
 // found in the LICENSE file.
 
 import * as Host from '../../core/host/host.js';
+import * as Platform from '../../core/platform/platform.js';
 import type * as Root from '../../core/root/root.js';
 import {updateHostConfig} from '../../testing/EnvironmentHelpers.js';
 
 import * as UI from './legacy.js';
 
+const {urlString} = Platform.DevToolsPath;
+
 describe('UIUtils', () => {
   describe('openInNewTab', () => {
     const {openInNewTab} = UI.UIUtils;
@@ -42,13 +45,7 @@ describe('UIUtils', () => {
 
         openInNewTab(url);
 
-        sinon.assert.calledOnceWithMatch(stub, sinon.match(value => {
-          try {
-            return new URL(value).searchParams.get('utm_source') === 'unittests';
-          } catch {
-            return false;
-          }
-        }, 'doesn\'t have `utm_source=unittests` search parameter'));
+        sinon.assert.calledOnceWithExactly(stub, urlString`${url}`);
         stub.restore();
       }
     });
@@ -67,13 +64,8 @@ describe('UIUtils', () => {
 
         openInNewTab(url);
 
-        sinon.assert.calledOnceWithMatch(stub, sinon.match(value => {
-          try {
-            return new URL(value).searchParams.get('utm_source') === 'devtools';
-          } catch {
-            return false;
-          }
-        }, 'doesn\'t have `utm_source=devtools` search parameter'));
+        sinon.assert.calledOnce(stub);
+        assert.strictEqual(new URL(stub.args[0][0]).searchParams.get('utm_source'), 'devtools');
         stub.restore();
       }
     });
@@ -101,43 +93,13 @@ describe('UIUtils', () => {
 
           openInNewTab(url);
 
-          sinon.assert.calledOnceWithMatch(stub, sinon.match(value => {
-            try {
-              return new URL(value).searchParams.get('utm_campaign') === channel;
-            } catch {
-              return false;
-            }
-          }, `doesn't have \`utm_campaign=${channel}\` search parameter`));
+          sinon.assert.calledOnce(stub);
+          assert.strictEqual(new URL(stub.args[0][0]).searchParams.get('utm_campaign'), channel);
           stub.restore();
         }
       }
     });
 
-    it('adds `utm_medium=referral` search parameter to Google documentation set links', () => {
-      const URLs = [
-        'http://developer.chrome.com/docs/devtools/workspaces/',
-        'http://developers.google.com/learn/',
-        'http://web.dev/',
-        'https://developer.chrome.com/docs/devtools/',
-        'https://developers.google.com/community/',
-        'https://web.dev/baseline/',
-      ];
-      for (const url of URLs) {
-        const stub = sinon.stub(InspectorFrontendHostInstance, 'openInNewTab');
-
-        openInNewTab(url);
-
-        sinon.assert.calledOnceWithMatch(stub, sinon.match(value => {
-          try {
-            return new URL(value).searchParams.get('utm_medium') === 'referral';
-          } catch {
-            return false;
-          }
-        }, 'doesn\'t have `utm_medium=referral` search parameter'));
-        stub.restore();
-      }
-    });
-
     it('correctly preserves anchors', () => {
       updateHostConfig({channel: 'stable'});
       const stub = sinon.stub(InspectorFrontendHostInstance, 'openInNewTab');

front_end/ui/legacy/UIUtils.ts

@@ -1982,16 +1982,13 @@ export function measuredScrollbarWidth(document?: Document|null): number {
 export function openInNewTab(url: URL|string): void {
   url = new URL(`${url}`);
   if (['developer.chrome.com', 'developers.google.com', 'web.dev'].includes(url.hostname)) {
+    if (!url.searchParams.has('utm_source')) {
+      url.searchParams.append('utm_source', 'devtools');
+    }
     const {channel} = Root.Runtime.hostConfig;
     if (!url.searchParams.has('utm_campaign') && typeof channel === 'string') {
       url.searchParams.append('utm_campaign', channel);
     }
-    if (!url.searchParams.has('utm_medium')) {
-      url.searchParams.append('utm_medium', 'referral');
-    }
-    if (!url.searchParams.has('utm_source')) {
-      url.searchParams.append('utm_source', 'devtools');
-    }
   }
   Host.InspectorFrontendHost.InspectorFrontendHostInstance.openInNewTab(Platform.DevToolsPath.urlString`${url}`);
 }