Remove remoting::Clipboard::Stop().

remoting/host/clipboard_win.cc

Index: remoting/host/clipboard_win.cc
diff --git a/remoting/host/clipboard_win.cc b/remoting/host/clipboard_win.cc
index dd2cc28395326d9019a2578b862dee9a8cb26d67..7c25ec2ef8af0752c6118111177848de3482d369 100644
--- a/remoting/host/clipboard_win.cc
+++ b/remoting/host/clipboard_win.cc
@@ -107,12 +107,12 @@ namespace remoting {
 class ClipboardWin : public Clipboard {
  public:
   ClipboardWin();
+  ~ClipboardWin() override;
 
   virtual void Start(
       scoped_ptr<protocol::ClipboardStub> client_clipboard) override;
   virtual void InjectClipboardEvent(
       const protocol::ClipboardEvent& event) override;
-  virtual void Stop() override;
 
  private:
   void OnClipboardUpdate();
@@ -138,6 +138,11 @@ ClipboardWin::ClipboardWin()
       remove_clipboard_format_listener_(nullptr) {
 }
 
+ClipboardWin::~ClipboardWin() {
+  if (window_ && remove_clipboard_format_listener_)
+    (*remove_clipboard_format_listener_)(window_->hwnd());
+}
+
 void ClipboardWin::Start(
     scoped_ptr<protocol::ClipboardStub> client_clipboard) {
   DCHECK(!add_clipboard_format_listener_);
@@ -179,15 +184,6 @@ void ClipboardWin::Start(
   }
 }
 
-void ClipboardWin::Stop() {
-  client_clipboard_.reset();
-
-  if (window_ && remove_clipboard_format_listener_)
-    (*remove_clipboard_format_listener_)(window_->hwnd());
-
-  window_.reset();
-}
-
 void ClipboardWin::InjectClipboardEvent(
     const protocol::ClipboardEvent& event) {
   if (!window_)