gn: Allow users to set 'check_includes' in action_foreach().

tools/gn/target_generator.h

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef TOOLS_GN_TARGET_GENERATOR_H_
 #define TOOLS_GN_TARGET_GENERATOR_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 35 matching lines @@
   // Derived classes implement this to do type-specific generation.
   virtual void DoRun() = 0;
 
   const BuildSettings* GetBuildSettings() const;
 
   bool FillSources();
   bool FillPublic();
   bool FillInputs();
   bool FillConfigs();
   bool FillOutputs(bool allow_substitutions);
+  bool FillCheckIncludes();
 
   // Rrturns true if the given pattern will expand to a file in the output
   // directory. If not, returns false and sets the error, blaming the given
   // Value.
   bool EnsureSubstitutionIsInOutputDir(
       const SubstitutionPattern& pattern,
       const Value& original_value);
 
   Target* target_;
   Scope* scope_;
@@ skipping 11 matching lines @@
   bool FillGenericConfigs(const char* var_name,
                           UniqueVector<LabelConfigPair>* dest);
   bool FillGenericDeps(const char* var_name, LabelTargetVector* dest);
 
   bool FillForwardDependentConfigs();
 
   DISALLOW_COPY_AND_ASSIGN(TargetGenerator);
 };
 
 #endif  // TOOLS_GN_TARGET_GENERATOR_H_