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_context.h

@@ -37,7 +37,6 @@ class CefPermissionContext {
                          content::WebContents* web_contents,
                          const PermissionRequestID& id,
                          const GURL& requesting_frame,
-                         bool user_gesture,
                          const BrowserPermissionCallback& callback);
 
   // Withdraw an existing permission request, no op if the permission request
@@ -65,7 +64,6 @@ class CefPermissionContext {
                         const PermissionRequestID& id,
                         const GURL& requesting_origin,
                         const GURL& embedding_origin,
-                        bool user_gesture,
                         const BrowserPermissionCallback& callback);
 
   void QueryPermission(content::PermissionType permission,