fix: empty result of `webContents.getUserAgent()` (#35151)

fix: empty result of webContents.getUserAgent()

Co-authored-by: Shelley Vohr <[email protected]>

shell/browser/api/electron_api_web_contents.cc

@@ -659,10 +659,8 @@ WebContents::WebContents(v8::Isolate* isolate,
   auto session = Session::CreateFrom(isolate, GetBrowserContext());
   session_.Reset(isolate, session.ToV8());
 
-  absl::optional<std::string> user_agent_override =
-      GetBrowserContext()->GetUserAgentOverride();
-  if (user_agent_override)
-    SetUserAgent(*user_agent_override);
+  SetUserAgent(GetBrowserContext()->GetUserAgent());
+
   web_contents->SetUserData(kElectronApiWebContentsKey,
                             std::make_unique<UserDataLink>(GetWeakPtr()));
   InitZoomController(web_contents, gin::Dictionary::CreateEmpty(isolate));
@@ -868,10 +866,7 @@ void WebContents::InitWithSessionAndOptions(
 
   AutofillDriverFactory::CreateForWebContents(web_contents());
 
-  absl::optional<std::string> user_agent_override =
-      GetBrowserContext()->GetUserAgentOverride();
-  if (user_agent_override)
-    SetUserAgent(*user_agent_override);
+  SetUserAgent(GetBrowserContext()->GetUserAgent());
 
   if (IsGuest()) {
     NativeWindow* owner_window = nullptr;

shell/browser/electron_browser_context.cc

@@ -308,11 +308,6 @@ std::string ElectronBrowserContext::GetUserAgent() const {
   return user_agent_.value_or(ElectronBrowserClient::Get()->GetUserAgent());
 }
 
-absl::optional<std::string> ElectronBrowserContext::GetUserAgentOverride()
-    const {
-  return user_agent_;
-}
-
 predictors::PreconnectManager* ElectronBrowserContext::GetPreconnectManager() {
   if (!preconnect_manager_.get()) {
     preconnect_manager_ =

shell/browser/electron_browser_context.h

@@ -85,7 +85,6 @@ class ElectronBrowserContext : public content::BrowserContext {
 
   void SetUserAgent(const std::string& user_agent);
   std::string GetUserAgent() const;
-  absl::optional<std::string> GetUserAgentOverride() const;
   bool CanUseHttpCache() const;
   int GetMaxCacheSize() const;
   ResolveProxyHelper* GetResolveProxyHelper();

spec-main/api-web-contents-spec.ts

@@ -847,6 +847,12 @@ describe('webContents module', () => {
   });
 
   describe('userAgent APIs', () => {
+    it('is not empty by default', () => {
+      const w = new BrowserWindow({ show: false });
+      const userAgent = w.webContents.getUserAgent();
+      expect(userAgent).to.be.a('string').that.is.not.empty();
+    });
+
     it('can set the user agent (functions)', () => {
       const w = new BrowserWindow({ show: false });
       const userAgent = w.webContents.getUserAgent();