Switch over to using SkRegions to calculate dirty areas.

remoting/base/capture_data.cc

 // Copyright (c) 2010 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 "remoting/base/capture_data.h"
 
 namespace remoting {
 
 DataPlanes::DataPlanes() {
   for (int i = 0; i < kPlaneCount; ++i) {
     data[i] = NULL;
     strides[i] = 0;
   }
 }
 
 CaptureData::CaptureData(const DataPlanes &data_planes,
                          const gfx::Size& size,
                          media::VideoFrame::Format format)
     : data_planes_(data_planes),
-      dirty_rects_(),
+      dirty_region_(),
       size_(size),
       pixel_format_(format),
       capture_time_ms_(0),
       client_sequence_number_(0) {
 }
 
 CaptureData::~CaptureData() {}
 
 }  // namespace remoting