Track the cost of impl-side painting.

cc/picture_pile.cc

Index: cc/picture_pile.cc
===================================================================
--- cc/picture_pile.cc	(revision 170195)
+++ cc/picture_pile.cc	(working copy)
@@ -4,8 +4,10 @@
 
 #include <algorithm>
 
+#include "base/time.h"
 #include "cc/picture_pile.h"
 #include "cc/picture_pile_impl.h"
+#include "cc/rendering_stats.h"
 
 namespace cc {
 
@@ -38,6 +40,8 @@
     ContentLayerClient* painter,
     const Region&,
     RenderingStats& stats) {
+  base::TimeTicks paintBeginTime = base::TimeTicks::Now();
+
   // TODO(enne): Add things to the pile, consolidate if needed, etc...
   // TODO(enne): Only re-record invalidated areas.
   // TODO(enne): Also re-record areas that have been newly exposed by resize.
@@ -47,6 +51,9 @@
   pile_.clear();
   pile_.push_back(Picture::Create());
   pile_[0]->Record(painter, gfx::Rect(gfx::Point(), size_), stats);
+
+  stats.totalPaintTimeInSeconds += (base::TimeTicks::Now() -

[nduca, 2012/11/29 18:16:30]

Lets move this into accounting Picture::Record

[Tom Hudson, 2012/11/29 19:16:11]

D'oh! Picture::Record already does it, so this was double-counting.

+                                    paintBeginTime).InSecondsF();

[nduca, 2012/11/29 18:16:30]

i think we also need to track the number of pixels recorded...

[Tom Hudson, 2012/11/29 19:16:11]

Done.

 }
 
 void PicturePile::PushPropertiesTo(PicturePileImpl* other) {