move annotations to canvas virtual

src/core/SkPicturePlayback.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 "SkCanvas.h"
 #include "SkPatchUtils.h"
 #include "SkPictureData.h"
@@ skipping 157 matching lines @@
             }
         } break;
         case PUSH_CULL: break;  // Deprecated, safe to ignore both push and pop.
         case POP_CULL:  break;
         case CONCAT: {
             SkMatrix matrix;
             reader->readMatrix(&matrix);
             canvas->concat(matrix);
             break;
         }
+        case DRAW_ANNOTATION: {
+            const SkRect& rect = reader->skipT<SkRect>();
+            const char* key = reader->readString();
+            SkAutoTUnref<SkData> value(reader->readData());
+            canvas->drawAnnotation(rect, key, value);
+        } break;
         case DRAW_ATLAS: {
             const SkPaint* paint = fPictureData->getPaint(reader);
             const SkImage* atlas = fPictureData->getImage(reader);
             const uint32_t flags = reader->readU32();
             const int count = reader->readU32();
             const SkRSXform* xform = (const SkRSXform*)reader->skip(count * sizeof(SkRSXform));
             const SkRect* tex = (const SkRect*)reader->skip(count * sizeof(SkRect));
             const SkColor* colors = nullptr;
             SkXfermode::Mode mode = SkXfermode::kDst_Mode;
             if (flags & DRAW_ATLAS_HAS_COLORS) {
@@ skipping 333 matching lines @@
         case TRANSLATE: {
             SkScalar dx = reader->readScalar();
             SkScalar dy = reader->readScalar();
             canvas->translate(dx, dy);
         } break;
         default:
             SkASSERTF(false, "Unknown draw type: %d", op);
     }
 }