Add GN substitution support for Ninja's $in_newline

tools/gn/substitution_type.cc

 // Copyright 2014 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/substitution_type.h"
 
 #include <stdlib.h>
 
 #include "tools/gn/err.h"
 
@@ skipping 19 matching lines @@
 
   "{{cflags}}",  // SUBSTITUTION_CFLAGS
   "{{cflags_c}}",  // SUBSTITUTION_CFLAGS_C
   "{{cflags_cc}}",  // SUBSTITUTION_CFLAGS_CC
   "{{cflags_objc}}",  // SUBSTITUTION_CFLAGS_OBJC
   "{{cflags_objcc}}",  // SUBSTITUTION_CFLAGS_OBJCC
   "{{defines}}",  // SUBSTITUTION_DEFINES
   "{{include_dirs}}",  // SUBSTITUTION_INCLUDE_DIRS
 
   "{{inputs}}",  // SUBSTITUTION_LINKER_INPUTS
+  "{{inputs_newline}}",  // SUBSTITUTION_LINKER_INPUTS_NEWLINE
   "{{ldflags}}",  // SUBSTITUTION_LDFLAGS
   "{{libs}}",  // SUBSTITUTION_LIBS
   "{{output_extension}}",  // SUBSTITUTION_OUTPUT_EXTENSION
   "{{solibs}}",  // SUBSTITUTION_SOLIBS
 };
 
 const char* kSubstitutionNinjaNames[SUBSTITUTION_NUM_TYPES] = {
   NULL,  // SUBSTITUTION_LITERAL
 
   "in",  // SUBSTITUTION_SOURCE
@@ skipping 18 matching lines @@
   "cflags_cc",  // SUBSTITUTION_CFLAGS_CC
   "cflags_objc",  // SUBSTITUTION_CFLAGS_OBJC
   "cflags_objcc",  // SUBSTITUTION_CFLAGS_OBJCC
   "defines",  // SUBSTITUTION_DEFINES
   "include_dirs",  // SUBSTITUTION_INCLUDE_DIRS
 
   // LINKER_INPUTS expands to the same Ninja var as SUBSTITUTION_SOURCE. These
   // are used in different contexts and are named differently to keep things
   // clear, but they both expand to the "set of input files" for a build rule.
   "in",  // SUBSTITUTION_LINKER_INPUTS
+  "in_newline",  // SUBSTITUTION_LINKER_INPUTS_NEWLINE
   "ldflags",  // SUBSTITUTION_LDFLAGS
   "libs",  // SUBSTITUTION_LIBS
   "output_extension",  // SUBSTITUTION_OUTPUT_EXTENSION
   "solibs",  // SUBSTITUTION_SOLIBS
 };
 
 SubstitutionBits::SubstitutionBits() : used() {
 }
 
 void SubstitutionBits::MergeFrom(const SubstitutionBits& other) {
@@ skipping 54 matching lines @@
 
 bool IsValidCompilerOutputsSubstitution(SubstitutionType type) {
   // All tool types except "output" (which would be infinitely recursive).
   return (IsValidToolSubstutition(type) && type != SUBSTITUTION_OUTPUT) ||
          IsValidSourceSubstitution(type);
 }
 
 bool IsValidLinkerSubstitution(SubstitutionType type) {
   return IsValidToolSubstutition(type) ||
          type == SUBSTITUTION_LINKER_INPUTS ||
+         type == SUBSTITUTION_LINKER_INPUTS_NEWLINE ||
          type == SUBSTITUTION_LDFLAGS ||
          type == SUBSTITUTION_LIBS ||
          type == SUBSTITUTION_OUTPUT_EXTENSION ||
          type == SUBSTITUTION_SOLIBS;
 }
 
 bool IsValidLinkerOutputsSubstitution(SubstitutionType type) {
   // All valid compiler outputs plus the output extension.
   return IsValidCompilerOutputsSubstitution(type) ||
          type == SUBSTITUTION_OUTPUT_EXTENSION;
@@ skipping 12 matching lines @@
     if (!IsValidSourceSubstitution(types[i])) {
       *err = Err(origin, "Invalid substitution type.",
           "The substitution " + std::string(kSubstitutionNames[i]) +
           " isn't valid for something\n"
           "operating on a source file such as this.");
       return false;
     }
   }
   return true;
 }