Update to Chromium revision 304f01a1 (#358063)

- Improve ordering of CefLoadHandler callbacks. OnLoadingStateChange will
  be called before and after all calls to OnLoadStart and OnLoadEnd.
  OnLoadStart/OnLoadEnd calls will occur as matching pairs
  (see http://crbug.com/539952#c2).
- Remove the |requesting_url| argument to CefGeolocationHandler::
  OnCancelGeolocationPermission. Clients can use the |request_id| argument
  to track this information themselves.
- Fix a crash when loading the PDF extension in multiple browsers with a
  custom CefRequestContext (issue #1757).

libcef_dll/cpptoc/geolocation_handler_cpptoc.cc

@@ -55,7 +55,7 @@ int CEF_CALLBACK geolocation_handler_on_request_geolocation_permission(
 
 void CEF_CALLBACK geolocation_handler_on_cancel_geolocation_permission(
     struct _cef_geolocation_handler_t* self, cef_browser_t* browser,
-    const cef_string_t* requesting_url, int request_id) {
+    int request_id) {
   // AUTO-GENERATED CONTENT - DELETE THIS COMMENT BEFORE MODIFYING
 
   DCHECK(self);
@@ -65,15 +65,10 @@ void CEF_CALLBACK geolocation_handler_on_cancel_geolocation_permission(
   DCHECK(browser);
   if (!browser)
     return;
-  // Verify param: requesting_url; type: string_byref_const
-  DCHECK(requesting_url);
-  if (!requesting_url)
-    return;
 
   // Execute
   CefGeolocationHandlerCppToC::Get(self)->OnCancelGeolocationPermission(
       CefBrowserCToCpp::Wrap(browser),
-      CefString(requesting_url),
       request_id);
 }