Allow mojo_runner to connect to arbitrary executables.

mojo/runner/out_of_process_native_runner.h

Index: mojo/runner/out_of_process_native_runner.h
diff --git a/mojo/runner/out_of_process_native_runner.h b/mojo/runner/out_of_process_native_runner.h
index 5cd1b5e7bd7afb290973ffaa3ec162cac0cdc418..4021c4f693d34f99d5b59f18f0a8345f11b54d7c 100644
--- a/mojo/runner/out_of_process_native_runner.h
+++ b/mojo/runner/out_of_process_native_runner.h
@@ -50,7 +50,8 @@ class OutOfProcessNativeRunnerFactory : public shell::NativeRunnerFactory {
       : context_(context) {}
   ~OutOfProcessNativeRunnerFactory() override {}
 
-  scoped_ptr<shell::NativeRunner> Create() override;
+  scoped_ptr<shell::NativeRunner> Create(
+      const base::FilePath& app_path) override;
 
  private:
   Context* const context_;