Fix the T-Rex easter egg on iOS.

ios/web/web_state/web_view_internal_creation_util.mm

Index: ios/web/web_state/web_view_internal_creation_util.mm
diff --git a/ios/web/web_state/web_view_internal_creation_util.mm b/ios/web/web_state/web_view_internal_creation_util.mm
index 691d0863479cd9c82295418651ca010393ee3b0c..4a96aaeb365a154d08b50f7ddc4e8c8ea3ad8938 100644
--- a/ios/web/web_state/web_view_internal_creation_util.mm
+++ b/ios/web/web_state/web_view_internal_creation_util.mm
@@ -33,32 +33,35 @@ void VerifyWKWebViewCreationPreConditions(
                            WKWebViewConfiguration* configuration,
                            BrowserState* browser_state,
                            BOOL use_desktop_user_agent) {
-  WKWebView* web_view = CreateWKWebView(frame, configuration, browser_state);
-  web_view.customUserAgent = base::SysUTF8ToNSString(
-      web::GetWebClient()->GetUserAgent(use_desktop_user_agent));
-  return web_view;
-}
-
-WKWebView* CreateWKWebView(CGRect frame,
-                           WKWebViewConfiguration* configuration,
-                           BrowserState* browser_state) {
   VerifyWKWebViewCreationPreConditions(browser_state, configuration);
 
   GetWebClient()->PreWebViewCreation();
-  WKWebView* result =
+  WKWebView* web_view =
       [[WKWebView alloc] initWithFrame:frame configuration:configuration];
 
+  // Set the user agent.
+  web_view.customUserAgent = base::SysUTF8ToNSString(
+      web::GetWebClient()->GetUserAgent(use_desktop_user_agent));
+
   // By default the web view uses a very sluggish scroll speed. Set it to a more
   // reasonable value.
-  result.scrollView.decelerationRate = UIScrollViewDecelerationRateNormal;
+  web_view.scrollView.decelerationRate = UIScrollViewDecelerationRateNormal;
 
   // Starting in iOS10, |allowsLinkPreview| defaults to YES.  This should be
   // disabled since the default implementation will open the link in Safari.
   // TODO(crbug.com/622746): Remove once web// link preview implementation is
   // created.
-  result.allowsLinkPreview = NO;
+  web_view.allowsLinkPreview = NO;
+
+  return web_view;
+}
 
-  return result;
+WKWebView* CreateWKWebView(CGRect frame,
+                           WKWebViewConfiguration* configuration,
+                           BrowserState* browser_state) {
+  BOOL use_desktop_user_agent = NO;
+  return CreateWKWebView(frame, configuration, browser_state,
+                         use_desktop_user_agent);
 }
 
 }  // namespace web