- Make sure that externals are patched for dart2js.

runtime/bin/platform.h

Index: runtime/bin/platform.h
diff --git a/runtime/bin/platform.h b/runtime/bin/platform.h
index 4d847e77d5a030cd711a4cf43a95f35a1c45e847..4dec601654a77aa306c856a36bcba615d7dea2d1 100644
--- a/runtime/bin/platform.h
+++ b/runtime/bin/platform.h
@@ -56,14 +56,6 @@ class Platform {
     return resolved_executable_name_;
   }
 
-  // Stores and gets the package root.
-  static void SetPackageRoot(const char* package_root) {
-    package_root_ = package_root;
-  }
-  static const char* GetPackageRoot() {
-    return package_root_;
-  }
-
   // Stores and gets the flags passed to the executable.
   static void SetExecutableArguments(int script_index, char** argv) {
     script_index_ = script_index;
@@ -84,7 +76,6 @@ class Platform {
   // The path to the resolved executable.
   static const char* resolved_executable_name_;
 
-  static const char* package_root_;
   static int script_index_;
   static char** argv_;  // VM flags are argv_[1 ... script_index_ - 1]