Rename GN tool's deps to depsformat.

tools/gn/ninja_toolchain_writer.cc

 // 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.
 
 #include "tools/gn/ninja_toolchain_writer.h"
 
 #include <fstream>
 
 #include "base/file_util.h"
 #include "base/strings/stringize_macros.h"
@@ skipping 61 matching lines @@
       continue;
 
     out_ << "rule " << rule_prefix << Toolchain::ToolTypeToName(tool_type)
          << std::endl;
 
     #define WRITE_ARG(name) \
       if (!tool.name.empty()) \
         out_ << indent << "  " STRINGIZE(name) " = " << tool.name << std::endl;
     WRITE_ARG(command);
     WRITE_ARG(depfile);
-    WRITE_ARG(deps);
     WRITE_ARG(description);
     WRITE_ARG(pool);
     WRITE_ARG(restat);
     WRITE_ARG(rspfile);
     WRITE_ARG(rspfile_content);
     #undef WRITE_ARG
+
+    // Deps is called "depsformat" in GN to avoid confusion with dependencies.
+    if (!tool.depsformat.empty()) \
+      out_ << indent << "  deps = " << tool.depsformat << std::endl;
   }
   out_ << std::endl;
 }
 
 void NinjaToolchainWriter::WriteSubninjas() {
   // Write subninja commands for each generated target.
   for (size_t i = 0; i < targets_.size(); i++) {
     OutputFile ninja_file = helper_.GetNinjaFileForTarget(targets_[i]);
     out_ << "subninja ";
     path_output_.WriteFile(out_, ninja_file);
     out_ << std::endl;
   }
   out_ << std::endl;
 }