Remove BrowserContext URL

Add BrowserContext.getURL which gets the URL from the session.page.

src/cdp/domains/page.zig

@@ -61,10 +61,10 @@ fn getFrameTree(cmd: anytype) !void {
     return cmd.sendResult(.{
         .frameTree = .{
             .frame = Frame{
-                .url = bc.url,
                 .id = target_id,
                 .loaderId = bc.loader_id,
                 .securityOrigin = bc.security_origin,
+                .url = bc.getURL() orelse "about:blank",
                 .secureContextType = bc.secure_context_type,
             },
         },
@@ -154,7 +154,6 @@ pub fn navigateToUrl(cmd: anytype, url: []const u8, send_result: bool) !void {
 
     // change state
     bc.reset();
-    bc.url = url;
     bc.loader_id = cmd.cdp.loader_id_gen.next();
 
     const LifecycleEvent = struct {
@@ -285,7 +284,7 @@ test "cdp.page: getFrameTree" {
                 .frame = .{
                     .id = "TID-3",
                     .loaderId = bc.loader_id,
-                    .url = bc.url,
+                    .url = "about:blank",
                     .domainAndRegistry = "",
                     .securityOrigin = bc.security_origin,
                     .mimeType = "text/html",

src/cdp/domains/target.zig

@@ -132,7 +132,6 @@ fn createTarget(cmd: anytype) !void {
     _ = try bc.session.createPage(aux_data);
 
     // change CDP state
-    bc.url = "about:blank";
     bc.security_origin = "://";
     bc.secure_context_type = "InsecureScheme";
     bc.loader_id = LOADER_ID;
@@ -142,11 +141,11 @@ fn createTarget(cmd: anytype) !void {
     // has been enabled?
     try cmd.sendEvent("Target.targetCreated", .{
         .targetInfo = TargetInfo{
-            .url = bc.url,
+            .attached = false,
             .targetId = target_id,
             .title = "about:blank",
             .browserContextId = bc.id,
-            .attached = false,
+            .url = "about:blank",
         },
     }, .{});