Enable *.js reformatting in format-code.sh

Change the format-code.shdeveloper script to also automatically reformat
any change JavaScript file.

In the past, all JS code written in this repository was formatted
manually. The plan is to switch to the clang-based automatic formatting,
and the first step on this route is to apply it to every changed file.

This contributes to the refactoring effort tracked by #264.

format-code.sh

@@ -14,12 +14,12 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-# This script formats the modified C++ files via clang-format according to the
-# Chromium C++ Style Guide.
+# This script formats the modified C++/JS files via clang-format according to
+# the Chromium Style Guides.
 # Only files that are known to Git and belong to the diff of the "master" branch
 # are considered.
 #
-# Note: Sorting of #include's is currently disabled, since the standard
+# Note: Sorting of C/C++ #include's is currently disabled, since the standard
 # algorithm reorders them incorrectly (e.g., it puts includes within our project
 # into the same group as C system headers).
 
@@ -31,7 +31,7 @@ cd $(dirname $(realpath ${0}))
 # Find all relevant touched files. Bail out if nothing is found.
 # Note: "d" in --diff-filter means excluding deleted files - otherwise
 # clang-format fails on these non-existing files.
-FILES=$(git diff --name-only --diff-filter=d master -- "*.cc" "*.h")
+FILES=$(git diff --name-only --diff-filter=d master -- "*.cc" "*.h" "*.js")
 [ "${FILES}" ] || exit 0
 
 # Run clang-format on every found file.