add drawPicture variant that takes a matrix and paint

will need some staging strategy, since chrome and blink have overrides of onDrawPicture

R=robertphillips@google.com, fmalita@google.com, bsalomon@google.com, mtklein@google.com

Author: reed@google.com

Review URL: https://codereview.chromium.org/448793004
diff --git a/src/utils/SkDumpCanvas.cpp b/src/utils/SkDumpCanvas.cpp
index 3c683e6..946aaa3 100644
--- a/src/utils/SkDumpCanvas.cpp
+++ b/src/utils/SkDumpCanvas.cpp
@@ -422,11 +422,12 @@
                str.c_str(), byteLength);
 }
 
-void SkDumpCanvas::onDrawPicture(const SkPicture* picture) {
+void SkDumpCanvas::onDrawPicture(const SkPicture* picture, const SkMatrix* matrix,
+                                 const SkPaint* paint) {
     this->dump(kDrawPicture_Verb, NULL, "drawPicture(%p) %d:%d", picture,
                picture->width(), picture->height());
     fNestLevel += 1;
-    this->INHERITED::onDrawPicture(picture);
+    this->INHERITED::onDrawPicture(picture, matrix, paint);
     fNestLevel -= 1;
     this->dump(kDrawPicture_Verb, NULL, "endPicture(%p) %d:%d", &picture,
                picture->width(), picture->height());