Update to Chromium revision 0bfd25d4 (#381305)

- Delete include/cef_runnable.h (issue #1336).
- Build the cef_unittests target using all Chromium headers. Add a
  USING_CHROMIUM_INCLUDES define and libcef_dll_wrapper_unittests
  target to support this. This change avoids compile errors due to
  the divergence of CEF and Chromium base/ header implementations.
  The libcef_dll_wrapper sources must now compile successfully with
  both CEF and Chromium base/ headers (issue #1632).
- The onbeforeunload message specified via JavaScript is no longer
  passed to the client (see http://crbug.com/587940).

libcef/browser/file_dialog_manager.cc

@@ -11,6 +11,7 @@
 #include "libcef/browser/browser_host_impl.h"
 #include "libcef/browser/thread_util.h"
 
+#include "base/threading/worker_pool.h"
 #include "content/public/browser/render_view_host.h"
 #include "content/public/common/file_chooser_file_info.h"
 #include "net/base/directory_lister.h"
@@ -364,7 +365,7 @@ void CefFileDialogManager::OnRunFileChooserUploadFolderDelegateCallback(
         new UploadFolderHelper(
             base::Bind(&CefFileDialogManager::OnRunFileChooserDelegateCallback,
                        weak_ptr_factory_.GetWeakPtr(), mode))));
-    lister_->Start();
+    lister_->Start(base::WorkerPool::GetTaskRunner(true).get());
   }
 }