cc: Clean up naming of paint-related identifiers

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 08c5761fea496103f9002e9df8c913a8216f2563..ca425afa286214e72222a29976196b0f6d98c75c 100644
--- a/cc/layers/picture_layer.cc
+++ b/cc/layers/picture_layer.cc
@@ -141,10 +141,10 @@ void PictureLayer::SetIsMask(bool is_mask) {
   is_mask_ = is_mask;
 }
 
-sk_sp<PaintRecord> PictureLayer::GetPicture() const {
-  // We could either flatten the RecordingSource into a single
-  // PaintRecord, or paint a fresh one depending on what we intend to do with
-  // the record. For now we just paint a fresh one to get consistent results.
+sk_sp<SkPicture> PictureLayer::GetPicture() const {
+  // We could either flatten the RecordingSource into a single SkPicture, or
+  // paint a fresh one depending on what we intend to do with it.  For now we
+  // just paint a fresh one to get consistent results.
   if (!DrawsContent())
     return nullptr;