Add support for Mac/iOS application bundles to GN tool.

tools/gn/target_generator.cc

Index: tools/gn/target_generator.cc
diff --git a/tools/gn/target_generator.cc b/tools/gn/target_generator.cc
index 3734ea9c3424ccf82c7511268a6438b07d9ac259..44ad2574dd7a24cca834df8882f9179f552100d2 100644
--- a/tools/gn/target_generator.cc
+++ b/tools/gn/target_generator.cc
@@ -44,6 +44,9 @@ void TargetGenerator::Run() {
   if (!FillData())
     return;
 
+  if (!FillBundleData())
+    return;
+
   if (!FillDependencies())
     return;
 
@@ -84,8 +87,13 @@ void TargetGenerator::GenerateTarget(Scope* scope,
   target->set_defined_from(function_call);
 
   // Create and call out to the proper generator.
-  if (output_type == functions::kCopy) {
-    CopyTargetGenerator generator(target.get(), scope, function_call, err);
+  if (output_type == functions::kCopy ||
+      output_type == functions::kCopyBundleData) {
+    Target::OutputType target_output_type = output_type == functions::kCopy
+                                                ? Target::COPY_FILES
+                                                : Target::COPY_BUNDLE_DATA;
+    CopyTargetGenerator generator(target.get(), scope, function_call,
+                                  target_output_type, err);
     generator.Run();
   } else if (output_type == functions::kAction) {
     ActionTargetGenerator generator(target.get(), scope, function_call,
@@ -238,6 +246,20 @@ bool TargetGenerator::FillData() {
   return true;
 }
 
+bool TargetGenerator::FillBundleData() {
+  const Value* value = scope_->GetValue(variables::kBundleData, true);
+  if (!value)
+    return true;
+
+  Target::FileList bundle_data;
+  if (!ExtractListOfRelativeFiles(scope_->settings()->build_settings(), *value,
+                                  scope_->GetSourceDir(), &bundle_data, err_))
+    return false;
+
+  target_->bundle_data().insert(bundle_data.begin(), bundle_data.end());
+  return true;
+}
+
 bool TargetGenerator::FillDependencies() {
   if (!FillGenericDeps(variables::kDeps, &target_->private_deps()))
     return false;