Switch over to using SkRegions to calculate dirty areas.

remoting/host/capturer_fake_ascii.cc

Index: remoting/host/capturer_fake_ascii.cc
diff --git a/remoting/host/capturer_fake_ascii.cc b/remoting/host/capturer_fake_ascii.cc
index 40f450994891ead06d7db5ac6f849558981f3a9f..e24bebd0d218cf1c64f0d960489f64c98efc43eb 100644
--- a/remoting/host/capturer_fake_ascii.cc
+++ b/remoting/host/capturer_fake_ascii.cc
@@ -37,23 +37,23 @@ media::VideoFrame::Format CapturerFakeAscii::pixel_format() const {
   return pixel_format_;
 }
 
-void CapturerFakeAscii::ClearInvalidRects() {
-  helper.ClearInvalidRects();
+void CapturerFakeAscii::ClearInvalidRegion() {
+  helper_.ClearInvalidRegion();
 }
 
-void CapturerFakeAscii::InvalidateRects(const InvalidRects& inval_rects) {
-  helper.InvalidateRects(inval_rects);
+void CapturerFakeAscii::InvalidateRegion(const SkRegion& invalid_region) {
+  helper_.InvalidateRegion(invalid_region);
 }
 
 void CapturerFakeAscii::InvalidateScreen(const gfx::Size& size) {
-  helper.InvalidateScreen(size);
+  helper_.InvalidateScreen(size);
 }
 
 void CapturerFakeAscii::InvalidateFullScreen() {
-  helper.InvalidateFullScreen();
+  helper_.InvalidateFullScreen();
 }
 
-void CapturerFakeAscii::CaptureInvalidRects(
+void CapturerFakeAscii::CaptureInvalidRegion(
     CaptureCompletedCallback* callback) {
   scoped_ptr<CaptureCompletedCallback> callback_deleter(callback);
 
@@ -65,13 +65,13 @@ void CapturerFakeAscii::CaptureInvalidRects(
   scoped_refptr<CaptureData> capture_data(new CaptureData(
       planes, gfx::Size(width_, height_), pixel_format_));
 
-  helper.set_size_most_recent(capture_data->size());
+  helper_.set_size_most_recent(capture_data->size());
 
   callback->Run(capture_data);
 }
 
 const gfx::Size& CapturerFakeAscii::size_most_recent() const {
-  return helper.size_most_recent();
+  return helper_.size_most_recent();
 }
 
 void CapturerFakeAscii::GenerateImage() {