tools/gn: Convert for loops to use the new range-based loops in C++11.

tools/gn/ninja_binary_target_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_binary_target_writer.h"
 
 #include <set>
 #include <sstream>
 
 #include "base/strings/string_util.h"
@@ skipping 423 matching lines @@
   }
 }
 
 void NinjaBinaryTargetWriter::WriteOrderOnlyDependencies(
     const UniqueVector<const Target*>& non_linkable_deps) {
   const std::vector<SourceFile>& data = target_->data();
   if (!non_linkable_deps.empty() || !data.empty()) {
     out_ << " ||";
 
     // Non-linkable targets.
-    for (size_t i = 0; i < non_linkable_deps.size(); i++) {
+    for (const auto& non_linkable_dep : non_linkable_deps) {
       out_ << " ";
-      path_output_.WriteFile(
-          out_, non_linkable_deps[i]->dependency_output_file());
+      path_output_.WriteFile(out_, non_linkable_dep->dependency_output_file());
     }
   }
 }
 
 bool NinjaBinaryTargetWriter::GetOutputFilesForSource(
     const Target* target,
     const SourceFile& source,
     Toolchain::ToolType* computed_tool_type,
     std::vector<OutputFile>* outputs) const {
   outputs->clear();
@@ skipping 14 matching lines @@
     return false;  // No tool for this file (it's a header file or something).
   const Tool* tool = target->toolchain()->GetTool(*computed_tool_type);
   if (!tool)
     return false;  // Tool does not apply for this toolchain.file.
 
   // Figure out what output(s) this compiler produces.
   SubstitutionWriter::ApplyListToCompilerAsOutputFile(
       target, source, tool->outputs(), outputs);
   return !outputs->empty();
 }