[browser/test] try revert google-chrome-stable

Signed-off-by: Alex Tugarev <[email protected]>

.travis.yml

@@ -54,13 +54,12 @@ env:
 addons:
   apt:
     sources:
-    - google-chrome
     - ubuntu-toolchain-r-test
     packages:
     - g++-4.8
     - oracle-java9-set-default
     - libsecret-1-dev
-    - google-chrome-stable
+    chrome: stable
 before_script:
   - export DISPLAY=:99.0; sh -e /etc/init.d/xvfb start ;
   - google-chrome-stable --headless --disable-gpu --remote-debugging-port=9222 http://localhost \&  ;