Stop using some scoped_ptr features that unique_ptr doesn't have

webrtc/modules/desktop_capture/desktop_and_cursor_composer_unittest.cc

 /*
  *  Copyright (c) 2013 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 172 matching lines @@
 // fails.
 TEST_F(DesktopAndCursorComposerTest, Error) {
   blender_.Start(this);
 
   fake_cursor_->SetHotspot(DesktopVector());
   fake_cursor_->SetState(MouseCursorMonitor::INSIDE, DesktopVector());
   fake_screen_->SetNextFrame(NULL);
 
   blender_.Capture(DesktopRegion());
 
-  EXPECT_EQ(frame_, static_cast<DesktopFrame*>(NULL));
+  EXPECT_EQ(frame_.get(), static_cast<DesktopFrame*>(NULL));
 }
 
 TEST_F(DesktopAndCursorComposerTest, Blend) {
   struct {
     int x, y;
     int hotspot_x, hotspot_y;
     bool inside;
   } tests[] = {
     {0, 0, 0, 0, true},
     {50, 50, 0, 0, true},
@@ skipping 35 matching lines @@
     // Verify that the cursor is erased before the frame buffer is returned to
     // the screen capturer.
     frame_.reset();
     VerifyFrame(*frame, MouseCursorMonitor::OUTSIDE, DesktopVector());
   }
 }
 
 }  // namespace
 
 }  // namespace webrtc