Add support for data deps.

tools/gn/toolchain.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_TOOLCHAIN_H_
 #define TOOLS_GN_TOOLCHAIN_H_
 
 #include "base/compiler_specific.h"
 #include "base/strings/string_piece.h"
 #include "tools/gn/item.h"
@@ skipping 14 matching lines @@
  public:
   enum ToolType {
     TYPE_NONE = 0,
     TYPE_CC,
     TYPE_CXX,
     TYPE_OBJC,
     TYPE_OBJCXX,
     TYPE_ASM,
     TYPE_ALINK,
     TYPE_SOLINK,
-    TYPE_SOLINK_MODULE,
     TYPE_LINK,
     TYPE_STAMP,
     TYPE_COPY,
 
     TYPE_NUMTYPES  // Must be last.
   };
 
   static const char* kToolCc;
   static const char* kToolCxx;
   static const char* kToolObjC;
   static const char* kToolObjCxx;
   static const char* kToolAsm;
   static const char* kToolAlink;
   static const char* kToolSolink;
-  static const char* kToolSolinkModule;
   static const char* kToolLink;
   static const char* kToolStamp;
   static const char* kToolCopy;
 
   struct Tool {
     Tool();
     ~Tool();
 
     bool empty() const {
       return command.empty() && depfile.empty() && deps.empty() &&
@@ skipping 28 matching lines @@
   const std::string& environment() const { return environment_; }
   void set_environment(const std::string& env) { environment_ = env; }
 
  private:
   Tool tools_[TYPE_NUMTYPES];
 
   std::string environment_;
 };
 
 #endif  // TOOLS_GN_TOOLCHAIN_H_