[chromium-style] move methods out of headers

brightray/browser/browser_client.cc

@@ -58,6 +58,13 @@ BrowserClient::BrowserClient() : browser_main_parts_(nullptr) {
 
 BrowserClient::~BrowserClient() {}
 
+
+void BrowserClient::WebNotificationAllowed(
+    int render_process_id,
+    const base::Callback<void(bool, bool)>& callback) {
+  callback.Run(false, true);
+}
+
 NotificationPresenter* BrowserClient::GetNotificationPresenter() {
   if (!notification_presenter_) {
     // Create a new presenter if on OS X, Linux, or Windows 7+