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/renderer/webkit_glue.h

@@ -44,6 +44,10 @@ int64 GetIdentifier(blink::WebFrame* frame);
 blink::WebFrame* FindFrameByUniqueName(const blink::WebString& unique_name,
                                        blink::WebFrame* relative_to_frame);
 
+// Initialize PartitionAlloc before calling Blink functions from the browser
+// process. Safe to call multiple times.
+void InitializePartitionAlloc();
+
 bool ParseCSSColor(const blink::WebString& string, bool strict, SkColor& color);
 
 }  // webkit_glue