Allow mojo_runner to connect to arbitrary executables.

mojo/shell/native_runner.h

Index: mojo/shell/native_runner.h
diff --git a/mojo/shell/native_runner.h b/mojo/shell/native_runner.h
index dd48cb343d70abf0933f538f229768c5a159675a..d4d5b8b3fe18f17cde4244ccd1168fb0ec6d7126 100644
--- a/mojo/shell/native_runner.h
+++ b/mojo/shell/native_runner.h
@@ -43,7 +43,7 @@ class NativeRunner {
 class NativeRunnerFactory {
  public:
   virtual ~NativeRunnerFactory() {}
-  virtual scoped_ptr<NativeRunner> Create() = 0;
+  virtual scoped_ptr<NativeRunner> Create(const base::FilePath& app_path) = 0;
 };
 
 }  // namespace shell