Add ninja console pool support to GN

tools/gn/action_target_generator.cc

Index: tools/gn/action_target_generator.cc
diff --git a/tools/gn/action_target_generator.cc b/tools/gn/action_target_generator.cc
index 3cd4e4756fb038a5ad1d941da9b149c93a7320f2..40523fe08b94ecd12bf00cf4dac9ee1994f74db4 100644
--- a/tools/gn/action_target_generator.cc
+++ b/tools/gn/action_target_generator.cc
@@ -54,6 +54,9 @@ void ActionTargetGenerator::DoRun() {
   if (!FillDepfile())
     return;
 
+  if (!FillConsole())
+    return;
+
   if (!FillCheckIncludes())
     return;
 
@@ -107,6 +110,16 @@ bool ActionTargetGenerator::FillDepfile() {
   return true;
 }
 
+bool ActionTargetGenerator::FillConsole() {
+  const Value* value = scope_->GetValue(variables::kConsole, true);
+  if (!value)
+    return true;
+  if (!value->VerifyTypeIs(Value::BOOLEAN, err_))
+    return false;
+  target_->action_values().set_console(value->boolean_value());
+  return true;
+}
+
 bool ActionTargetGenerator::CheckOutputs() {
   const SubstitutionList& outputs = target_->action_values().outputs();
   if (outputs.list().empty()) {