Clang style checker: turn on checks for nested classes

BUG=139346,136863

Review URL: https://chromiumcodereview.appspot.com/10830276

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@151483 0039d316-1c4b-4281-b951-d872f2087c98

tools/clang/scripts/plugin_flags.sh

@@ -19,4 +19,6 @@ fi
 echo -Xclang -load -Xclang $CLANG_LIB_PATH/libFindBadConstructs.$LIBSUFFIX \
   -Xclang -add-plugin -Xclang find-bad-constructs \
   -Xclang -plugin-arg-find-bad-constructs \
-  -Xclang skip-virtuals-in-implementations
+  -Xclang skip-virtuals-in-implementations \
+  -Xclang -plugin-arg-find-bad-constructs \
+  -Xclang check-inner-classes