chrome: Add setting for controlling the status bubble (fixes isse #3279)

This change adds `CefBrowserSettings.chrome_status_bubble` for controlling
whether the Chrome status bubble will be used.

Testable in cefclient by passing the `--hide-chrome-status-bubble`
command-line flag.

include/internal/cef_types.h

@@ -520,7 +520,7 @@ typedef struct _cef_browser_settings_t {
   ///
   int windowless_frame_rate;
 
-  // The below values map to WebPreferences settings.
+  // BEGIN values that map to WebPreferences settings.
 
   ///
   // Font settings.
@@ -622,6 +622,8 @@ typedef struct _cef_browser_settings_t {
   ///
   cef_state_t webgl;
 
+  // END values that map to WebPreferences settings.
+
   ///
   // Background color used for the browser before a document is loaded and when
   // no document color is specified. The alpha component must be either fully
@@ -641,6 +643,13 @@ typedef struct _cef_browser_settings_t {
   // empty then "en-US,en" will be used.
   ///
   cef_string_t accept_language_list;
+
+  ///
+  // Controls whether the Chrome status bubble will be used. Only supported with
+  // the Chrome runtime. For details about the status bubble see
+  // https://www.chromium.org/user-experience/status-bubble/
+  ///
+  cef_state_t chrome_status_bubble;
 } cef_browser_settings_t;
 
 ///

include/internal/cef_types_wrappers.h

@@ -718,6 +718,8 @@ struct CefBrowserSettingsTraits {
     cef_string_set(src->accept_language_list.str,
                    src->accept_language_list.length,
                    &target->accept_language_list, copy);
+
+    target->chrome_status_bubble = src->chrome_status_bubble;
   }
 };