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/common/parser_impl.cc

@@ -143,6 +143,9 @@ CefString CefURIDecode(const CefString& text,
 bool CefParseCSSColor(const CefString& string,
                       bool strict,
                       cef_color_t& color) {
+  // Blink types depend on PartitionAlloc. Safe to call multiple times.
+  webkit_glue::InitializePartitionAlloc();
+
   return webkit_glue::ParseCSSColor(
       blink::WebString::fromUTF8(string.ToString().data()), strict, color);
 }