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

tools/gn/target.cc

Index: tools/gn/target.cc
diff --git a/tools/gn/target.cc b/tools/gn/target.cc
index 49a22fcbd8c4289e14623ebe2d39e8f68325f0a2..6917edf34b88cd1f119bb6859268233465c7226a 100644
--- a/tools/gn/target.cc
+++ b/tools/gn/target.cc
@@ -138,6 +138,8 @@ const char* Target::GetStringForOutputType(OutputType type) {
       return "Source set";
     case COPY_FILES:
       return "Copy";
+    case COPY_BUNDLE_DATA:
+      return "Copy bundle data";
     case ACTION:
       return "Action";
     case ACTION_FOREACH:
@@ -193,6 +195,10 @@ bool Target::OnResolved(Err* err) {
     const ConfigValues& cur = iter.cur();
     all_lib_dirs_.append(cur.lib_dirs().begin(), cur.lib_dirs().end());
     all_libs_.append(cur.libs().begin(), cur.libs().end());
+    if (output_type_ == COPY_BUNDLE_DATA) {
+      sources_.insert(
+          sources_.end(), cur.bundle_data().begin(), cur.bundle_data().end());
+    }
   }
 
   PullDependentTargetLibs();
@@ -226,6 +232,7 @@ bool Target::IsFinal() const {
          output_type_ == ACTION ||
          output_type_ == ACTION_FOREACH ||
          output_type_ == COPY_FILES ||
+         output_type_ == COPY_BUNDLE_DATA ||
          (output_type_ == STATIC_LIBRARY && complete_static_lib_);
 }
 
@@ -363,6 +370,7 @@ void Target::FillOutputFiles() {
     case GROUP:
     case SOURCE_SET:
     case COPY_FILES:
+    case COPY_BUNDLE_DATA:
     case ACTION:
     case ACTION_FOREACH: {
       // These don't get linked to and use stamps which should be the first