Add --url command-line switch to set an initial URL. (youtube#4908)

b/362296377

cobalt/BUILD.gn

@@ -46,6 +46,7 @@ if (!is_android) {
 
     deps = [
       "//cobalt/browser",
+      "//cobalt/browser:switches",
       "//cobalt/renderer:renderer",
       "//content/public/app",
       "//content/shell:content_shell_app",

cobalt/browser/BUILD.gn

@@ -55,6 +55,15 @@ source_set("browser") {
   }
 }
 
+source_set("switches") {
+  sources = [
+    "switches.cc",
+    "switches.h",
+  ]
+
+  deps = [ "//base" ]
+}
+
 config("embed_polyfilled_javascript_config") {
   include_dirs = [ root_gen_dir ]
 }

cobalt/browser/switches.cc

@@ -0,0 +1,34 @@
+// Copyright 2025 The Cobalt Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "cobalt/browser/switches.h"
+
+namespace cobalt {
+namespace switches {
+
+namespace {
+
+constexpr char kDefaultURL[] = "https://www.youtube.com/tv";
+
+}  // namespace
+
+std::string GetInitialURL(const base::CommandLine& command_line) {
+  if (command_line.HasSwitch(kInitialURL)) {
+    return command_line.GetSwitchValueASCII(kInitialURL);
+  }
+  return kDefaultURL;
+}
+
+}  // namespace switches
+}  // namespace cobalt

cobalt/browser/switches.h

@@ -0,0 +1,33 @@
+// Copyright 2025 The Cobalt Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include <string>
+
+#include "base/command_line.h"
+
+#ifndef COBALT_BROWSER_SWITCHES_H_
+#define COBALT_BROWSER_SWITCHES_H_
+
+namespace cobalt {
+namespace switches {
+
+// Allow the user to override the default URL via a command line parameter.
+std::string GetInitialURL(const base::CommandLine& command_line);
+
+constexpr char kInitialURL[] = "url";
+
+}  // namespace switches
+}  // namespace cobalt
+
+#endif  // COBALT_BROWSER_SWITCHES_H_

cobalt/cobalt.cc

@@ -19,10 +19,12 @@
 #include <vector>
 
 #include "base/at_exit.h"
+#include "base/command_line.h"
 #include "base/lazy_instance.h"
 #include "base/logging.h"
 #include "base/no_destructor.h"
 #include "build/build_config.h"
+#include "cobalt/browser/switches.h"
 #include "cobalt/cobalt_main_delegate.h"
 #include "cobalt/platform_event_source_starboard.h"
 #include "content/public/app/content_main.h"
@@ -46,11 +48,14 @@ static PlatformEventSourceStarboard* g_platform_event_source = nullptr;
 }  // namespace
 
 int InitCobalt(int argc, const char** argv, const char* initial_deep_link) {
+  const std::string initial_url =
+      cobalt::switches::GetInitialURL(base::CommandLine(argc, argv));
+
   // content::ContentMainParams params(g_content_main_delegate.Get().get());
   content::ContentMainParams params(g_content_main_delegate);
 
   // TODO: (cobalt b/375241103) Reimplement this in a clean way.
-  constexpr auto cobalt_args = std::to_array<const char*>(
+  const auto cobalt_args = std::to_array<const char*>(
       {// Disable first run experience, kiosk, etc.
        "--disable-fre", "--no-first-run", "--kiosk",
        // Enable Blink to work in overlay video mode
@@ -72,7 +77,7 @@ int InitCobalt(int argc, const char** argv, const char* initial_deep_link) {
        // This flag is added specifically for m114 and should be removed after
        // rebasing to m120+
        "--user-level-memory-pressure-signal-params", "--no-sandbox",
-       "https://www.youtube.com/tv"});
+       initial_url.c_str()});
   std::vector<const char*> args(argv, argv + argc);
   args.insert(args.end(), cobalt_args.begin(), cobalt_args.end());