Exclude .idl files from the generated compilable files lists.

Review URL: http://codereview.chromium.org/16614

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@8426 0039d316-1c4b-4281-b951-d872f2087c98

site_scons/site_tools/chromium_builders.py

@@ -58,10 +58,12 @@ non_compilable_suffixes = {
         '.h',
         '.dat',
         '.rc',
+        '.idl',
     ]),
     'WINDOWS' : set([
         '.h',
         '.dat',
+        '.idl',
     ]),
 }