Fix clang build

mojo/services/native_viewport/android/mojo_viewport.cc

 // Copyright 2013 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.
 
 #include "mojo/services/native_viewport/android/mojo_viewport.h"
 
 #include <android/native_window_jni.h>
 #include "base/android/jni_android.h"
 #include "jni/MojoViewport_jni.h"
 #include "ui/gl/gl_bindings.h"
 #include "ui/gl/gl_context.h"
 #include "ui/gl/scoped_make_current.h"
 
 namespace mojo {
 namespace services {
 
+MojoViewportInit::MojoViewportInit() {
+}
+
+MojoViewportInit::~MojoViewportInit() {
+}
+
 static jint Init(JNIEnv* env, jclass obj, jint jinit) {
   MojoViewportInit* init = reinterpret_cast<MojoViewportInit*>(jinit);
   MojoViewport* viewport = new MojoViewport(init);
   return reinterpret_cast<jint>(viewport);
 }
 
 MojoViewport::MojoViewport(MojoViewportInit* init)
     : ui_runner_(init->ui_runner),
       native_viewport_(init->native_viewport) {
   delete init;
@@ skipping 40 matching lines @@
 void MojoViewport::SurfaceSetSize(
     JNIEnv* env, jobject obj, jint width, jint height) {
 }
 
 bool MojoViewport::Register(JNIEnv* env) {
   return RegisterNativesImpl(env);
 }
 
 }  // namespace services
 }  // namespace mojo