Add cc/ to banned_directories in chromium clang style checker

tools/clang/plugins/ChromeClassTester.h

Index: tools/clang/plugins/ChromeClassTester.h
diff --git a/tools/clang/plugins/ChromeClassTester.h b/tools/clang/plugins/ChromeClassTester.h
index fe11fcd21c591b43f0325e88befefea711fab84c..07ead95324c816300f15348bd1b1c7ef7dd706fb 100644
--- a/tools/clang/plugins/ChromeClassTester.h
+++ b/tools/clang/plugins/ChromeClassTester.h
@@ -17,7 +17,8 @@
 class ChromeClassTester : public clang::ASTConsumer {
  public:
   explicit ChromeClassTester(clang::CompilerInstance& instance,
-                             bool check_inner_classes);
+                             bool check_inner_classes,
+                             bool check_cc_directory);
   virtual ~ChromeClassTester();
 
   // clang::ASTConsumer:
@@ -83,6 +84,9 @@ class ChromeClassTester : public clang::ASTConsumer {
 
   // TODO: Remove once all inner classes are cleaned up.
   bool check_inner_classes_;
+
+  // TODO(jamesr): Remove once cc/ directory compiles without warnings.
+  bool check_cc_directory_;
 };
 
 #endif  // TOOLS_CLANG_PLUGINS_CHROMECLASSTESTER_H_