chrome: Don't show the profile picker on startup (fixes issue #3440)

libcef/common/chrome/chrome_main_delegate_cef.cc

@@ -19,7 +19,9 @@
 #include "base/command_line.h"
 #include "base/lazy_instance.h"
 #include "base/threading/threading_features.h"
+#include "chrome/browser/metrics/chrome_feature_list_creator.h"
 #include "chrome/common/chrome_switches.h"
+#include "chrome/common/pref_names.h"
 #include "components/embedder_support/switches.h"
 #include "content/public/common/content_switches.h"
 #include "sandbox/policy/switches.h"
@@ -204,6 +206,27 @@ absl::optional<int> ChromeMainDelegateCef::PreBrowserMain() {
   return absl::nullopt;
 }
 
+absl::optional<int> ChromeMainDelegateCef::PostEarlyInitialization(
+    InvokedIn invoked_in) {
+  const auto result = ChromeMainDelegate::PostEarlyInitialization(invoked_in);
+  if (!result) {
+    const auto* invoked_in_browser =
+        absl::get_if<InvokedInBrowserProcess>(&invoked_in);
+    if (invoked_in_browser) {
+      // At this point local_state has been created but ownership has not yet
+      // been passed to BrowserProcessImpl (g_browser_process is nullptr).
+      auto* local_state = chrome_content_browser_client_->startup_data()
+                              ->chrome_feature_list_creator()
+                              ->local_state();
+
+      // Don't show the profile picker on startup (see issue #3440).
+      local_state->SetBoolean(prefs::kBrowserShowProfilePickerOnStartup, false);
+    }
+  }
+
+  return result;
+}
+
 absl::variant<int, content::MainFunctionParams>
 ChromeMainDelegateCef::RunProcess(
     const std::string& process_type,

libcef/common/chrome/chrome_main_delegate_cef.h

@@ -39,6 +39,7 @@ class ChromeMainDelegateCef : public ChromeMainDelegate,
   absl::optional<int> BasicStartupComplete() override;
   void PreSandboxStartup() override;
   absl::optional<int> PreBrowserMain() override;
+  absl::optional<int> PostEarlyInitialization(InvokedIn invoked_in) override;
   absl::variant<int, content::MainFunctionParams> RunProcess(
       const std::string& process_type,
       content::MainFunctionParams main_function_params) override;