Adds the UserInputMonitor implementation for Windows.

media/base/user_input_monitor_mac.cc

Index: media/base/user_input_monitor_mac.cc
diff --git a/media/base/user_input_monitor_mac.cc b/media/base/user_input_monitor_mac.cc
index 3d19134f321ded835bb3ce070139bda1b4dc5019..eebadf2d98c09df7c29b4918b3ca53880124e46f 100644
--- a/media/base/user_input_monitor_mac.cc
+++ b/media/base/user_input_monitor_mac.cc
@@ -12,11 +12,10 @@ namespace {
 class UserInputMonitorMac : public UserInputMonitor {
  public:
   UserInputMonitorMac();
-  virtual ~UserInputMonitorMac();
-
   virtual size_t GetKeyPressCount() const OVERRIDE;
 
  private:
+  virtual ~UserInputMonitorMac();
   virtual void StartMouseMonitoring() OVERRIDE;
   virtual void StopMouseMonitoring() OVERRIDE;
   virtual void StartKeyboardMonitoring() OVERRIDE;
@@ -48,10 +47,10 @@ void UserInputMonitorMac::StopKeyboardMonitoring() {}
 
 }  // namespace
 
-scoped_ptr<UserInputMonitor> UserInputMonitor::Create(
+scoped_refptr<UserInputMonitor> UserInputMonitor::Create(
     const scoped_refptr<base::SingleThreadTaskRunner>& input_task_runner,
     const scoped_refptr<base::SingleThreadTaskRunner>& ui_task_runner) {
-  return scoped_ptr<UserInputMonitor>(new UserInputMonitorMac());
+  return scoped_refptr<UserInputMonitor>(new UserInputMonitorMac());
 }
 
 }  // namespace media