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

tools/gn/target_generator.h

Index: tools/gn/target_generator.h
diff --git a/tools/gn/target_generator.h b/tools/gn/target_generator.h
index 4fa51f622ab40ca672bf5a481fc8b0dc41ed95be..9bbb4d23deb1d5909d8b07c42a83a550a6034542 100644
--- a/tools/gn/target_generator.h
+++ b/tools/gn/target_generator.h
@@ -53,8 +53,9 @@ class TargetGenerator {
   bool FillConfigs();
   bool FillOutputs(bool allow_substitutions);
   bool FillCheckIncludes();
+  bool FillBundleDataFilter();
 
-  // Rrturns true if the given pattern will expand to a file in the output
+  // Returns true if the given pattern will expand to a file in the output
   // directory. If not, returns false and sets the error, blaming the given
   // Value.
   bool EnsureSubstitutionIsInOutputDir(const SubstitutionPattern& pattern,
@@ -68,6 +69,7 @@ class TargetGenerator {
  private:
   bool FillDependentConfigs();  // Includes all types of dependent configs.
   bool FillData();
+  bool FillBundleData();
   bool FillDependencies();  // Includes data dependencies.
   bool FillTestonly();
   bool FillAssertNoDeps();