mojo_shell crashes on Linux

mojo/services/native_viewport/native_viewport_mac.mm

 // 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/native_viewport.h"
 
 #import <AppKit/NSApplication.h>
 #import <AppKit/NSView.h>
 #import <AppKit/NSWindow.h>
 
 #include "base/bind.h"
 #include "ui/gfx/rect.h"
 
 namespace mojo {
 namespace services {
 
 class NativeViewportMac : public NativeViewport {
  public:
   NativeViewportMac(NativeViewportDelegate* delegate)
       : delegate_(delegate),
         window_(nil),
         rect_(10, 10, 500, 500) {
-    [NSApplication sharedApplication];
-
-    window_ = [[NSWindow alloc]
-                  initWithContentRect:NSRectFromCGRect(rect_.ToCGRect())
-                            styleMask:NSTitledWindowMask
-                              backing:NSBackingStoreBuffered
-                                defer:NO];
-    [window_ orderFront:nil];
-    delegate_->OnAcceleratedWidgetAvailable([window_ contentView]);
   }
 
   virtual ~NativeViewportMac() {
     [window_ orderOut:nil];
     [window_ close];
   }
 
  private:
   // Overridden from NativeViewport:
   virtual gfx::Size GetSize() OVERRIDE {
     return rect_.size();
   }
 
+  virtual void Init() OVERRIDE {
+    [NSApplication sharedApplication];
+
+    window_ = [[NSWindow alloc]
+                  initWithContentRect:NSRectFromCGRect(rect_.ToCGRect())
+                            styleMask:NSTitledWindowMask
+                              backing:NSBackingStoreBuffered
+                                defer:NO];
+    [window_ orderFront:nil];
+    delegate_->OnAcceleratedWidgetAvailable([window_ contentView]);
+  }
+
   virtual void Close() OVERRIDE {
     // TODO(beng): perform this in response to NSWindow destruction.
     delegate_->OnDestroyed();
   }
 
   NativeViewportDelegate* delegate_;
   NSWindow* window_;
   gfx::Rect rect_;
 
   DISALLOW_COPY_AND_ASSIGN(NativeViewportMac);
 };
 
 // static
 scoped_ptr<NativeViewport> NativeViewport::Create(
     shell::Context* context,
     NativeViewportDelegate* delegate) {
   return scoped_ptr<NativeViewport>(new NativeViewportMac(delegate)).Pass();
 }
 
 }  // namespace services
 }  // namespace mojo