cc: Remove invalidation history

cc/test/fake_picture_pile_impl.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "cc/test/fake_picture_pile_impl.h"
 
 #include <algorithm>
 #include <limits>
 #include <utility>
 
@@ skipping 96 matching lines @@
 void FakePicturePileImpl::PlaybackToCanvas(SkCanvas* canvas,
                                            const gfx::Rect& canvas_rect,
                                            float contents_scale) const {
   if (playback_allowed_event_)
     playback_allowed_event_->Wait();
   PicturePileImpl::PlaybackToCanvas(canvas, canvas_rect, contents_scale);
 }
 
 bool FakePicturePileImpl::HasRecordingAt(int x, int y) const {
   PictureMap::const_iterator found = picture_map_.find(PictureMapKey(x, y));
-  if (found == picture_map_.end())
-    return false;
-  return !!found->second.GetPicture();
+  return found != picture_map_.end();
 }
 
 }  // namespace cc