Add mojom and fidl files to DEFAULT_WHITE_LIST

This will allow to ensure that fidl and mojom files have proper
copyright header.

Bug: 831384
Change-Id: I5e41bbf27f2e3f2c6749a52de7463d651d033b81
Reviewed-on: https://chromium-review.googlesource.com/1036606
Reviewed-by: Dirk Pranke <dpranke@chromium.org>
Commit-Queue: Sergey Ulanov <sergeyu@chromium.org>

presubmit_support.py

@@ -507,7 +507,8 @@ class InputApi(object):
       # Scripts
       r".+\.js$", r".+\.py$", r".+\.sh$", r".+\.rb$", r".+\.pl$", r".+\.pm$",
       # Other
-      r".+\.java$", r".+\.mk$", r".+\.am$", r".+\.css$"
+      r".+\.java$", r".+\.mk$", r".+\.am$", r".+\.css$", r".+\.mojom$",
+      r".+\.fidl$"
   )
 
   # Path regexp that should be excluded from being considered containing source

tests/presubmit_unittest.py

@@ -1159,11 +1159,13 @@ class InputApiUnittest(PresubmitTestsBase):
           f('a/PRESUBMIT.py'),
           f('a/FOO.json'),
           f('a/FOO.java'),
+          f('a/FOO.mojom'),
         ],
         [
           # Expected.
           'a/PRESUBMIT.py',
           'a/FOO.java',
+          'a/FOO.mojom',
         ],
       ),
       (
@@ -1185,7 +1187,7 @@ class InputApiUnittest(PresubmitTestsBase):
         self.fake_change, './PRESUBMIT.py', False, None, False)
     self.mox.ReplayAll()
 
-    self.assertEqual(len(input_api.DEFAULT_WHITE_LIST), 22)
+    self.assertEqual(len(input_api.DEFAULT_WHITE_LIST), 24)
     self.assertEqual(len(input_api.DEFAULT_BLACK_LIST), 12)
     for item in files:
       results = filter(input_api.FilterSourceFile, item[0])