Remove ShellPtrWatcher details from public header

mojo/public/cpp/application/lib/application_impl.cc

Index: mojo/public/cpp/application/lib/application_impl.cc
diff --git a/mojo/public/cpp/application/lib/application_impl.cc b/mojo/public/cpp/application/lib/application_impl.cc
index f47b58fdf3a538c523c24c37d1bca864d75d24bb..469ba3a9417f242f218b274c707892ff740b70e2 100644
--- a/mojo/public/cpp/application/lib/application_impl.cc
+++ b/mojo/public/cpp/application/lib/application_impl.cc
@@ -10,24 +10,31 @@
 
 namespace mojo {
 
-ApplicationImpl::ShellPtrWatcher::ShellPtrWatcher(ApplicationImpl* impl)
+class ApplicationImpl::ShellPtrWatcher : public ErrorHandler {
+ public:
+  ShellPtrWatcher(ApplicationImpl* impl)
     : impl_(impl) {}
 
-ApplicationImpl::ShellPtrWatcher::~ShellPtrWatcher() {}
+  virtual ~ShellPtrWatcher() {}
 
-void ApplicationImpl::ShellPtrWatcher::OnConnectionError() {
-  impl_->OnShellError();
-}
+  virtual void OnConnectionError() MOJO_OVERRIDE {
+    impl_->OnShellError();
+  }
+
+ private:
+  ApplicationImpl* impl_;
+  MOJO_DISALLOW_COPY_AND_ASSIGN(ShellPtrWatcher);
+};
 
 ApplicationImpl::ApplicationImpl(ApplicationDelegate* delegate,
                                  ScopedMessagePipeHandle shell_handle)
-    : delegate_(delegate), shell_watch_(this) {
+    : delegate_(delegate), shell_watch_(NULL) {
   BindShell(shell_handle.Pass());
 }
 
 ApplicationImpl::ApplicationImpl(ApplicationDelegate* delegate,
                                  MojoHandle shell_handle)
-    : delegate_(delegate), shell_watch_(this) {
+    : delegate_(delegate), shell_watch_(NULL) {
   BindShell(MakeScopedHandle(MessagePipeHandle(shell_handle)));
 }
 
@@ -44,6 +51,7 @@ void ApplicationImpl::ClearConnections() {
 
 ApplicationImpl::~ApplicationImpl() {
   ClearConnections();
+  delete shell_watch_;
 }
 
 ApplicationConnection* ApplicationImpl::ConnectToApplication(
@@ -63,9 +71,10 @@ ApplicationConnection* ApplicationImpl::ConnectToApplication(
 }
 
 void ApplicationImpl::BindShell(ScopedMessagePipeHandle shell_handle) {
+  shell_watch_ = new ShellPtrWatcher(this);
   shell_.Bind(shell_handle.Pass());
   shell_.set_client(this);
-  shell_.set_error_handler(&shell_watch_);
+  shell_.set_error_handler(shell_watch_);
   delegate_->Initialize(this);
 }