Strip old backend recording down to essentials

src/core/SkPicturePlayback.h

Index: src/core/SkPicturePlayback.h
diff --git a/src/core/SkPicturePlayback.h b/src/core/SkPicturePlayback.h
index cdfa8efe188292dbf06783eecec125c446add641..9e5db08c6309ad74e6dd1039bd5cb9d9491d4c23 100644
--- a/src/core/SkPicturePlayback.h
+++ b/src/core/SkPicturePlayback.h
@@ -9,7 +9,6 @@
 #define SkPicturePlayback_DEFINED
 
 #include "SkPictureFlat.h"  // for DrawType
-#include "SkPictureStateTree.h"
 
 class SkBitmap;
 class SkCanvas;
@@ -18,14 +17,11 @@ class SkPaint;
 class SkPictureData;
 
 // The basic picture playback class replays the provided picture into a canvas.
-// If the picture was generated with a BBH it is used to accelerate drawing
-// unless disabled via setUseBBH.
 class SkPicturePlayback : SkNoncopyable {
 public:
     SkPicturePlayback(const SkPicture* picture)
         : fPictureData(picture->fData.get())
-        , fCurOffset(0)
-        , fUseBBH(true) {
+        , fCurOffset(0) {
     }
     virtual ~SkPicturePlayback() { }
 
@@ -37,31 +33,18 @@ public:
     size_t curOpID() const { return fCurOffset; }
     void resetOpID() { fCurOffset = 0; }
 
-    // TODO: remove setUseBBH after cleaning up GrGatherCanvas
-    void setUseBBH(bool useBBH) { fUseBBH = useBBH; }
-
 protected:
     const SkPictureData* fPictureData;
 
     // The offset of the current operation when within the draw method
     size_t fCurOffset;
 
-    bool   fUseBBH;
-
-    void handleOp(SkReader32* reader, 
-                  DrawType op, 
-                  uint32_t size, 
+    void handleOp(SkReader32* reader,
+                  DrawType op,
+                  uint32_t size,
                   SkCanvas* canvas,
                   const SkMatrix& initialMatrix);
 
-    const SkPicture::OperationList* getActiveOps(const SkCanvas* canvas);
-    bool initIterator(SkPictureStateTree::Iterator* iter, 
-                      SkCanvas* canvas,
-                      const SkPicture::OperationList *activeOpsList);
-    static void StepIterator(SkPictureStateTree::Iterator* iter, SkReader32* reader);
-    static void SkipIterTo(SkPictureStateTree::Iterator* iter, 
-                           SkReader32* reader, uint32_t skipTo);
-
     static DrawType ReadOpAndSize(SkReader32* reader, uint32_t* size);
 
     class AutoResetOpID {