MiniBrowser should accept the '--url' command line argument

https://bugs.webkit.org/show_bug.cgi?id=247451
rdar://101924215

Reviewed by Tim Horton.

Just like https://bugs.webkit.org/show_bug.cgi?id=247378 we want Mac MiniBrowser to accept
the --url command line argument.

And just like in the MobileMiniBrowser case, this patch will allow you to set a --url argument
in the Xcode scheme with something like --url https://www.apple.com

* Tools/MiniBrowser/mac/AppDelegate.m:
(-[BrowserAppDelegate targetURLOrDefaultURL]):
(-[BrowserAppDelegate newWindow:]):

Canonical link: https://commits.webkit.org/256289@main

Tools/MiniBrowser/mac/AppDelegate.m

@@ -40,6 +40,8 @@
 #import <WebKit/_WKProcessPoolConfiguration.h>
 #import <WebKit/_WKWebsiteDataStoreConfiguration.h>
 
+static const NSString * const kURLArgumentString = @"--url";
+
 enum {
     WebKit1NewWindowTag = 1,
     WebKit2NewWindowTag = 2,
@@ -190,14 +192,28 @@ - (BrowserWindowController *)createBrowserWindowController:(id)sender
     return controller;
 }
 
+- (NSString *)targetURLOrDefaultURL
+{
+    NSArray *args = [[NSProcessInfo processInfo] arguments];
+    const NSUInteger targetURLIndex = [args indexOfObject:kURLArgumentString];
+    NSString *targetURL = nil;
+
+    if (targetURLIndex != NSNotFound && targetURLIndex + 1 < [args count])
+        targetURL = [args objectAtIndex:targetURLIndex + 1];
+
+    if (!targetURL || [targetURL isEqualToString:@""])
+        return _settingsController.defaultURL;
+    return targetURL;
+}
+
 - (IBAction)newWindow:(id)sender
 {
     BrowserWindowController *controller = [self createBrowserWindowController:sender];
     if (!controller)
         return;
 
     [[controller window] makeKeyAndOrderFront:sender];
-    [controller loadURLString:_settingsController.defaultURL];
+    [controller loadURLString:[self targetURLOrDefaultURL]];
 }
 
 - (IBAction)newPrivateWindow:(id)sender