Improve the way that settings are specified (issue #878).

- Change CefBrowserSettings members that previously used a boolean to instead use a cef_state_t enumeration with default, enabled and disabled states.
- Remove CefBrowserSettings members that are unlikely to be used and that can also be set using Chromium command-line switches.
- Change the CEF command-line switch naming pattern to match Chromium and move the implementation out of cefclient.
- Improve documentation by listing the command-line switch, if any, associated with each setting.

git-svn-id: https://chromiumembedded.googlecode.com/svn/trunk@1083 5089003a-bbd8-11dd-ad1f-f1f9622dbc98

tests/cefclient/cefclient_gtk.cpp

@@ -350,7 +350,7 @@ int main(int argc, char* argv[]) {
   CefSettings settings;
 
   // Populate the settings based on command line arguments.
-  AppGetSettings(settings, app);
+  AppGetSettings(settings);
 
   // Initialize CEF.
   CefInitialize(main_args, settings, app.get());
@@ -420,9 +420,6 @@ int main(int argc, char* argv[]) {
   CefWindowInfo window_info;
   CefBrowserSettings browserSettings;
 
-  // Populate the settings based on command line arguments.
-  AppGetBrowserSettings(browserSettings);
-
   window_info.SetAsChild(vbox);
 
   CefBrowserHost::CreateBrowserSync(