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

tools/gn/ninja_copy_target_writer_unittest.cc

Index: tools/gn/ninja_copy_target_writer_unittest.cc
diff --git a/tools/gn/ninja_copy_target_writer_unittest.cc b/tools/gn/ninja_copy_target_writer_unittest.cc
index e6ec2225dff2838527bdd65e5881a7dafb8805d4..c182f1e8cf6b08c8e21c32c2cf13f07c58182ced 100644
--- a/tools/gn/ninja_copy_target_writer_unittest.cc
+++ b/tools/gn/ninja_copy_target_writer_unittest.cc
@@ -29,7 +29,7 @@ TEST(NinjaCopyTargetWriter, Run) {
   ASSERT_TRUE(target.OnResolved(&err));
 
   std::ostringstream out;
-  NinjaCopyTargetWriter writer(&target, out);
+  NinjaCopyTargetWriter writer(&target, out, Toolchain::TYPE_COPY);
   writer.Run();
 
   const char expected_linux[] =
@@ -59,7 +59,7 @@ TEST(NinjaCopyTargetWriter, ToolchainDeps) {
   ASSERT_TRUE(target.OnResolved(&err));
 
   std::ostringstream out;
-  NinjaCopyTargetWriter writer(&target, out);
+  NinjaCopyTargetWriter writer(&target, out, Toolchain::TYPE_COPY);
   writer.Run();
 
   const char expected_linux[] =
@@ -86,7 +86,7 @@ TEST(NinjaCopyTargetWriter, OrderOnlyDeps) {
   ASSERT_TRUE(target.OnResolved(&err));
 
   std::ostringstream out;
-  NinjaCopyTargetWriter writer(&target, out);
+  NinjaCopyTargetWriter writer(&target, out, Toolchain::TYPE_COPY);
   writer.Run();
 
   const char expected_linux[] =