Consider bundle_data as public_deps of create_bundle targets.

tools/gn/bundle_data.h

Index: tools/gn/bundle_data.h
diff --git a/tools/gn/bundle_data.h b/tools/gn/bundle_data.h
index 9d1df13fe80f363665dbf5a7592234f3bf36deee..6465739885720fe6133b77120cdc58579880f0cf 100644
--- a/tools/gn/bundle_data.h
+++ b/tools/gn/bundle_data.h
@@ -9,6 +9,7 @@
 #include <vector>
 
 #include "tools/gn/bundle_file_rule.h"
+#include "tools/gn/unique_vector.h"
 
 class OutputFile;
 class SourceFile;
@@ -76,9 +77,13 @@ class BundleData {
   std::string& plugins_dir() { return plugins_dir_; }
   const std::string& plugins_dir() const { return plugins_dir_; }
 
+  UniqueVector<const Target*>& deps() { return deps_; }

[brettw, 2016/03/21 22:49:47]

Can you call this "bundle_deps" and comment that these are the recursive
collection of bundle_data targets that this target depends on?

[sdefresne, 2016/03/22 12:34:05]

done.

+  const UniqueVector<const Target*>& deps() const { return deps_; }
+
  private:
   std::vector<SourceFile> asset_catalog_sources_;
   std::vector<BundleFileRule> file_rules_;
+  UniqueVector<const Target*> deps_;
 
   // All those values are subdirectories relative to root_build_dir, and apart
   // from root_dir, they are either equal to root_dir_ or subdirectories of it.