Add EXPERIMENTAL_beginRecording() for SkRecord-based recording.

src/record/SkRecording.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 "SkRecording.h"
-
-#include "SkRecord.h"
-#include "SkRecordOpts.h"
-#include "SkRecordDraw.h"
-#include "SkRecorder.h"
-
-namespace EXPERIMENTAL {
-
-SkPlayback::SkPlayback(const SkRecord* record) : fRecord(record) {}
-
-SkPlayback::~SkPlayback() {}
-
-void SkPlayback::draw(SkCanvas* canvas) const {
-    SkASSERT(fRecord.get() != NULL);
-    SkRecordDraw(*fRecord, canvas);
-}
-
-SkRecording::SkRecording(int width, int height)
-    : fRecord(SkNEW(SkRecord))
-    , fRecorder(SkNEW_ARGS(SkRecorder, (fRecord.get(), width, height)))
-    {}
-
-SkPlayback* SkRecording::releasePlayback() {
-    SkASSERT(fRecorder->unique());
-    fRecorder->forgetRecord();
-    SkRecordOptimize(fRecord.get());
-    return SkNEW_ARGS(SkPlayback, (fRecord.detach()));
-}
-
-SkRecording::~SkRecording() {}
-
-SkCanvas* SkRecording::canvas() {
-    return fRecord.get() ? fRecorder.get() : NULL;
-}
-
-}  // namespace EXPERIMENTAL