- Electron version: 0.36.12, 0.37.6
- Operating system: Kubuntu 15.10

Try Ctrl+Shift+F, find progress freeze always.

atom/browser/common_web_contents_delegate.cc
#include "content/public/browser/render_widget_host.h"
#include "content/public/browser/security_style_explanation.h"
#include "content/public/browser/security_style_explanations.h"
#include "storage/browser/fileapi/isolated_context.h"
#if defined(TOOLKIT_VIEWS)
#include "atom/browser/native_window_views.h"
#endif
#if defined(USE_X11)
#include "atom/browser/browser.h"
#endif
using content::BrowserThread;
using security_state::SecurityStateModel;
namespace atom {
namespace {
const char kRootName[] = "<root>";
struct FileSystem {
  FileSystem() {
  }
  FileSystem(const std::string& file_system_name,
             const std::string& root_url,
             const std::string& file_system_path)
    : file_system_name(file_system_name),
      root_url(root_url),
      file_system_path(file_system_path) {
  }
  std::string file_system_name;
  std::string root_url;
  std::string file_system_path;
};
std::string RegisterFileSystem(content::WebContents* web_contents,