Fix bug in layer hoisting transition to SkRecord backend

src/core/SkRecordDraw.h

Index: src/core/SkRecordDraw.h
diff --git a/src/core/SkRecordDraw.h b/src/core/SkRecordDraw.h
index 033b76d34ae5d1cc0934a7d347a3f2136ff92c7e..35b0da6bfc1c627f986411a289438f15895c2293 100644
--- a/src/core/SkRecordDraw.h
+++ b/src/core/SkRecordDraw.h
@@ -11,6 +11,7 @@
 #include "SkBBoxHierarchy.h"
 #include "SkCanvas.h"
 #include "SkDrawPictureCallback.h"
+#include "SkMatrix.h"
 #include "SkRecord.h"
 
 // Fill a BBH to be used by SkRecordDraw to accelerate playback.
@@ -20,7 +21,12 @@ void SkRecordFillBounds(const SkRecord&, SkBBoxHierarchy*);
 void SkRecordDraw(const SkRecord&, SkCanvas*, const SkBBoxHierarchy*, SkDrawPictureCallback*);
 
 // Draw a portion of an SkRecord into an SkCanvas while replacing clears with drawRects.
-void SkRecordPartialDraw(const SkRecord&, SkCanvas*, const SkRect&, unsigned start, unsigned stop);
+// When drawing a portion of an SkRecord the CTM on the passed in canvas must be
+// the composition of the replay matrix with the record-time CTM (for the portion
+// of the record that is being replayed). For setMatrix calls to behave correctly
+// the initialCTM parameter must set to just the replay matrix.
+void SkRecordPartialDraw(const SkRecord&, SkCanvas*, const SkRect&, unsigned start, unsigned stop,
+                         const SkMatrix& initialCTM);
 
 namespace SkRecords {
 
@@ -34,19 +40,23 @@ public:
         this->draw(r);
     }
 
+protected:
+    SkMatrix fInitialCTM;
+
 private:
     // No base case, so we'll be compile-time checked that we implement all possibilities.
     template <typename T> void draw(const T&);
 
-    const SkMatrix fInitialCTM;
     SkCanvas* fCanvas;
 };
 
 // Used by SkRecordPartialDraw.
 class PartialDraw : public Draw {
 public:
-    PartialDraw(SkCanvas* canvas, const SkRect& clearRect)
-        : INHERITED(canvas), fClearRect(clearRect) {}
+    PartialDraw(SkCanvas* canvas, const SkRect& clearRect, const SkMatrix& initialCTM)
+        : INHERITED(canvas), fClearRect(clearRect) {
+        fInitialCTM = initialCTM;
+    }
 
     // Same as Draw for all ops except Clear.
     template <typename T> void operator()(const T& r) {