Replace RectVectors with SkRegions in Decoder.

remoting/client/plugin/pepper_view.cc

Index: remoting/client/plugin/pepper_view.cc
diff --git a/remoting/client/plugin/pepper_view.cc b/remoting/client/plugin/pepper_view.cc
index d8a776c8b31f26d08462bb48d3375f5507527c94..4a41f98af9426d237e99d490f6178c1d0b81f59d 100644
--- a/remoting/client/plugin/pepper_view.cc
+++ b/remoting/client/plugin/pepper_view.cc
@@ -110,7 +110,7 @@ void PepperView::SetHostSize(const SkISize& host_size) {
       host_size.width(), host_size.height());
 }
 
-void PepperView::PaintFrame(media::VideoFrame* frame, RectVector* rects) {
+void PepperView::PaintFrame(media::VideoFrame* frame, const SkRegion& region) {
   DCHECK(context_->main_message_loop()->BelongsToCurrentThread());
 
   SetHostSize(SkISize::Make(frame->width(), frame->height()));
@@ -124,8 +124,8 @@ void PepperView::PaintFrame(media::VideoFrame* frame, RectVector* rects) {
 
   // Copy updated regions to the backing store and then paint the regions.
   bool changes_made = false;
-  for (size_t i = 0; i < rects->size(); ++i)
-    changes_made |= PaintRect(frame, (*rects)[i]);
+  for (SkRegion::Iterator i(region); !i.done(); i.next())
+    changes_made |= PaintRect(frame, i.rect());
 
   if (changes_made)
     FlushGraphics(start_time);
@@ -313,13 +313,13 @@ void PepperView::ReleaseFrame(media::VideoFrame* frame) {
 }
 
 void PepperView::OnPartialFrameOutput(media::VideoFrame* frame,
-                                      RectVector* rects,
+                                      SkRegion* region,
                                       const base::Closure& done) {
   DCHECK(context_->main_message_loop()->BelongsToCurrentThread());
 
   // TODO(ajwong): Clean up this API to be async so we don't need to use a
   // member variable as a hack.
-  PaintFrame(frame, rects);
+  PaintFrame(frame, *region);
   done.Run();
 }