Replace scoped_ptr with unique_ptr in webrtc/base/

webrtc/base/x11windowpicker.h

Index: webrtc/base/x11windowpicker.h
diff --git a/webrtc/base/x11windowpicker.h b/webrtc/base/x11windowpicker.h
index 501adf5820be911e2f3564f11a433d3241aa1c40..d741759368be78e01c8e53a3a606f29ed35d4abf 100644
--- a/webrtc/base/x11windowpicker.h
+++ b/webrtc/base/x11windowpicker.h
@@ -11,8 +11,9 @@
 #ifndef WEBRTC_BASE_LINUXWINDOWPICKER_H_
 #define WEBRTC_BASE_LINUXWINDOWPICKER_H_
 
+#include <memory>
+
 #include "webrtc/base/basictypes.h"
-#include "webrtc/base/scoped_ptr.h"
 #include "webrtc/base/windowpicker.h"
 
 // Avoid include <X11/Xlib.h>.
@@ -44,7 +45,7 @@ class X11WindowPicker : public WindowPicker {
   uint8_t* GetDesktopThumbnail(const DesktopId& id, int width, int height);
 
  private:
-  scoped_ptr<XWindowEnumerator> enumerator_;
+  std::unique_ptr<XWindowEnumerator> enumerator_;
 };
 
 }  // namespace rtc