Use the mojo::shell namespace consistently underly shell/.

shell/android/run_android_application_function.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef SHELL_ANDROID_RUN_ANDROID_APPLICATION_FUNCTION_H_
 #define SHELL_ANDROID_RUN_ANDROID_APPLICATION_FUNCTION_H_
 
 #include "base/android/jni_android.h"
 #include "base/files/file_path.h"
 
+namespace mojo {
+namespace shell {
+
 // Type of the function that we inject from the main .so of the Mojo shell to
 // the helper libbootstrap.so. This function will set the thunks in the
 // application .so and call into application MojoMain. Injecting the function
 // from the main .so ensures that the thunks are set correctly.
 
-namespace mojo {
 typedef void (*RunAndroidApplicationFn)(JNIEnv* env,
                                         jobject j_context,
                                         const base::FilePath& app_path,
                                         jint j_handle);
-}
+
+}  // namespace shell
+}  // namespace mojo
 
 #endif  // SHELL_ANDROID_RUN_ANDROID_APPLICATION_FUNCTION_H_