Alter SkCanvas::drawPicture (devirtualize, take const SkPicture, take pointer)

R=reed@google.com, bsalomon@google.com, mtklein@google.com

Author: robertphillips@google.com

Review URL: https://codereview.chromium.org/313613004
diff --git a/gm/pathopsskpclip.cpp b/gm/pathopsskpclip.cpp
index e04692b..076f733 100644
--- a/gm/pathopsskpclip.cpp
+++ b/gm/pathopsskpclip.cpp
@@ -55,13 +55,13 @@
 
         canvas->setAllowSimplifyClip(true);
         canvas->save();
-        canvas->drawPicture(*pict);
+        canvas->drawPicture(pict);
         canvas->restore();
 
         canvas->setAllowSimplifyClip(false);
         canvas->save();
         canvas->translate(SkIntToScalar(1200 / 2), 0);
-        canvas->drawPicture(*pict);
+        canvas->drawPicture(pict);
         canvas->restore();
     }