Add support for data deps.

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 28 matching lines @@
   static void GenerateTarget(Scope* scope,
                              const Token& function_token,
                              const std::vector<Value>& args,
                              const std::string& output_type,
                              Err* err);
 
  private:
   // Sets err_ on failure.
   Target::OutputType GetOutputType() const;
 
-  // Reads configs from the given var name, and uses the given setting on the
-  // target to save them
+  // Reads configs/deps from the given var name, and uses the given setting on
+  // the target to save them.
   void FillGenericConfigs(const char* var_name,
                           void (Target::*setter)(std::vector<const Config*>*));
+  void FillGenericDeps(const char* var_name,
+                       void (Target::*setter)(std::vector<const Target*>*));
 
   void FillConfigs();
   void FillAllDependentConfigs();
   void FillDirectDependentConfigs();
   void FillSources();
   void FillData();
   void FillDependencies();
+  void FillDataDependencies();
   void FillDestDir();
   void FillScript();
   void FillScriptArgs();
   void FillOutputs();
 
   const BuildSettings* GetBuildSettings() const;
 
   Target* target_;
   Scope* scope_;
   const Token& function_token_;
   std::vector<Value> args_;
   std::string output_type_;
   Err* err_;
 
   // Sources are relative to this. This comes from the input file which doesn't
   // get freed so we don't acautlly have to make a copy.
   const SourceDir& input_directory_;
 
   FRIEND_TEST_ALL_PREFIXES(TargetGenerator, ResolveInputPath);
 
   DISALLOW_COPY_AND_ASSIGN(TargetGenerator);
 };
 
 #endif  // TOOLS_GN_TARGET_GENERATOR_H_