Implemented printToSkPicture without using WebViewBenchmarkSupport.

cc/layers/picture_layer.cc

Index: cc/layers/picture_layer.cc
diff --git a/cc/layers/picture_layer.cc b/cc/layers/picture_layer.cc
index 889e2fbd3f6e3ebac325bc35895276ac759c312e..34792eb98e5faf8c2a46d1407adee3d2e8b39c0d 100644
--- a/cc/layers/picture_layer.cc
+++ b/cc/layers/picture_layer.cc
@@ -6,6 +6,7 @@
 
 #include "cc/debug/benchmark_instrumentation.h"
 #include "cc/debug/devtools_instrumentation.h"
+#include "cc/layers/content_layer_client.h"
 #include "cc/layers/picture_layer_impl.h"
 #include "cc/trees/layer_tree_impl.h"
 #include "ui/gfx/rect_conversions.h"
@@ -130,4 +131,22 @@ bool PictureLayer::SupportsLCDText() const {
   return true;
 }
 
+skia::RefPtr<SkPicture> PictureLayer::GetPicture() const {
+  // We could either return the SkPicture in picture-pile,

[enne (OOO), 2013/08/20 01:25:15]

This comment is a little misleading.  PicturePile has a number of SkPictures
with different clips and offsets.  Maybe say "We could either flatten the
PicturePile into a single SkPicture or..."?

[alokp, 2013/08/20 18:01:56]

Done.

+  // or paint a fresh one depending on what we intend to do with the
+  // picture. For now we just paint a fresh one to get consistent results.
+  if (!DrawsContent())

[enne (OOO), 2013/08/20 01:25:15]

Can you make this early out consistent with the ContentLayer one? I think in
both cases you could just check DrawsContent() as that requires a non-null
client_.

[alokp, 2013/08/20 18:01:56]

Done.

+    return skia::RefPtr<SkPicture>();
+
+  int width = bounds().width();
+  int height = bounds().height();
+  gfx::RectF opaque;
+
+  skia::RefPtr<SkPicture> picture = skia::AdoptRef(new SkPicture);
+  SkCanvas* canvas = picture->beginRecording(width, height);
+  client_->PaintContents(canvas, gfx::Rect(width, height), &opaque);
+  picture->endRecording();
+  return picture;
+}
+
 }  // namespace cc