🚙 GN: Add write_runtime_deps variable

tools/gn/scheduler.h

Index: tools/gn/scheduler.h
diff --git a/tools/gn/scheduler.h b/tools/gn/scheduler.h
index 45225ceb6f7f1a3ed474ccfab939d1f770e673c2..a9bb036512259af6622f24b52997d484b24effb8 100644
--- a/tools/gn/scheduler.h
+++ b/tools/gn/scheduler.h
@@ -15,6 +15,9 @@
 #include "base/synchronization/lock.h"
 #include "base/threading/sequenced_worker_pool.h"
 #include "tools/gn/input_file_manager.h"
+#include "tools/gn/label.h"
+#include "tools/gn/source_file.h"
+#include "tools/gn/token.h"
 
 class Target;
 
@@ -57,6 +60,11 @@ class Scheduler {
   // inputs (see AddUnknownGeneratedInput below).
   void AddWrittenFile(const SourceFile& file);
 
+  // Schedules a file to be written due to a target setting write_runtime_deps.
+  void AddWriteRuntimeDepsTarget(const Target* entry);
+  std::vector<const Target*> GetWriteRuntimeDepsTargets() const;
+  bool IsFileGeneratedByWriteRuntimeDeps(const OutputFile& file) const;
+
   // Unknown generated inputs are files that a target declares as an input
   // in the output directory, but which aren't generated by any dependency.
   //
@@ -113,6 +121,7 @@ class Scheduler {
   // Protected by the lock. See the corresponding Add/Get functions above.
   std::vector<base::FilePath> gen_dependencies_;
   std::vector<SourceFile> written_files_;
+  std::vector<const Target*> write_runtime_deps_targets_;
   std::multimap<SourceFile, const Target*> unknown_generated_inputs_;
 
   DISALLOW_COPY_AND_ASSIGN(Scheduler);