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/permissions/permission_manager.h

@@ -36,13 +36,11 @@ class CefPermissionManager : public KeyedService,
       content::PermissionType permission,
       content::RenderFrameHost* render_frame_host,
       const GURL& requesting_origin,
-      bool user_gesture,
       const base::Callback<void(content::PermissionStatus)>& callback) override;
   int RequestPermissions(
       const std::vector<content::PermissionType>& permissions,
       content::RenderFrameHost* render_frame_host,
       const GURL& requesting_origin,
-      bool user_gesture,
       const base::Callback<void(
           const std::vector<content::PermissionStatus>&)>& callback) override;
   void CancelPermissionRequest(int request_id) override;