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

tools/gn/toolchain.cc

Index: tools/gn/toolchain.cc
diff --git a/tools/gn/toolchain.cc b/tools/gn/toolchain.cc
index 2a7035832234fa9da0b3cc61e5120a06f605539d..cc9bbba2fa5b57d1c68bed5841fb570355cf6272 100644
--- a/tools/gn/toolchain.cc
+++ b/tools/gn/toolchain.cc
@@ -24,6 +24,7 @@ const char* Toolchain::kToolSolinkModule = "solink_module";
 const char* Toolchain::kToolLink = "link";
 const char* Toolchain::kToolStamp = "stamp";
 const char* Toolchain::kToolCopy = "copy";
+const char* Toolchain::kToolCopyBundleData = "copy_bundle_data";
 
 Toolchain::Toolchain(const Settings* settings, const Label& label)
     : Item(settings, label),
@@ -56,6 +57,7 @@ Toolchain::ToolType Toolchain::ToolNameToType(const base::StringPiece& str) {
   if (str == kToolLink) return TYPE_LINK;
   if (str == kToolStamp) return TYPE_STAMP;
   if (str == kToolCopy) return TYPE_COPY;
+  if (str == kToolCopyBundleData) return TYPE_COPY_BUNDLE_DATA;
   return TYPE_NONE;
 }
 
@@ -74,6 +76,7 @@ std::string Toolchain::ToolTypeToName(ToolType type) {
     case TYPE_LINK: return kToolLink;
     case TYPE_STAMP: return kToolStamp;
     case TYPE_COPY: return kToolCopy;
+    case TYPE_COPY_BUNDLE_DATA: return kToolCopyBundleData;
     default:
       NOTREACHED();
       return std::string();
@@ -152,6 +155,7 @@ Toolchain::ToolType Toolchain::GetToolTypeForTargetFinalOutput(
     case Target::SOURCE_SET:
       return TYPE_STAMP;
     case Target::COPY_FILES:
+    case Target::COPY_BUNDLE_DATA:
     case Target::ACTION:
     case Target::ACTION_FOREACH:
       return TYPE_STAMP;