change drawPicture in SkRecord to just ref the picture

src/core/SkRecorder.cpp

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkRecorder.h"
 #include "SkPicture.h"
 
@@ skipping 39 matching lines @@
 T* SkRecorder::copy(const T* src) {
     if (NULL == src) {
         return NULL;
     }
     return SkNEW_PLACEMENT_ARGS(fRecord->alloc<T>(), T, (*src));
 }
 
 // This copy() is for arrays.
 // It will work with POD or non-POD, though currently we only use it for POD.
 template <typename T>
-T* SkRecorder::copy(const T src[], unsigned count) {
+T* SkRecorder::copy(const T src[], size_t count) {
     if (NULL == src) {
         return NULL;
     }
     T* dst = fRecord->alloc<T>(count);
-    for (unsigned i = 0; i < count; i++) {
+    for (size_t i = 0; i < count; i++) {
         SkNEW_PLACEMENT_ARGS(dst + i, T, (src[i]));
     }
     return dst;
 }
 
 // Specialization for copying strings, using memcpy.
 // This measured around 2x faster for copying code points,
 // but I found no corresponding speedup for other arrays.
 template <>
-char* SkRecorder::copy(const char src[], unsigned count) {
+char* SkRecorder::copy(const char src[], size_t count) {
     if (NULL == src) {
         return NULL;
     }
     char* dst = fRecord->alloc<char>(count);
     memcpy(dst, src, count);
     return dst;
 }
 
 void SkRecorder::clear(SkColor color) {
     APPEND(Clear, color);
@@ skipping 94 matching lines @@
                                   const SkMatrix* matrix, const SkPaint& paint) {
     APPEND(DrawTextOnPath,
            delay_copy(paint),
            this->copy((const char*)text, byteLength),
            byteLength,
            delay_copy(path),
            this->copy(matrix));
 }
 
 void SkRecorder::onDrawPicture(const SkPicture* picture) {
-    picture->draw(this);
+    APPEND(DrawPicture, picture);
 }
 
 void SkRecorder::drawVertices(VertexMode vmode,
                               int vertexCount, const SkPoint vertices[],
                               const SkPoint texs[], const SkColor colors[],
                               SkXfermode* xmode,
                               const uint16_t indices[], int indexCount, const SkPaint& paint) {
     APPEND(DrawVertices, delay_copy(paint),
                          vmode,
                          vertexCount,
@@ skipping 57 matching lines @@
 
 void SkRecorder::onClipPath(const SkPath& path, SkRegion::Op op, ClipEdgeStyle edgeStyle) {
     APPEND(ClipPath, delay_copy(path), op, edgeStyle == kSoft_ClipEdgeStyle);
     INHERITED(updateClipConservativelyUsingBounds, path.getBounds(), op, path.isInverseFillType());
 }
 
 void SkRecorder::onClipRegion(const SkRegion& deviceRgn, SkRegion::Op op) {
     APPEND(ClipRegion, delay_copy(deviceRgn), op);
     INHERITED(onClipRegion, deviceRgn, op);
 }