Revert of add backdrop option to SaveLayerRec (patchset #14 id:260001 of https://codereview.chromium.org/1523053003/ )

Reason for revert:
serialized != direct, will investigate

Original issue's description:
> add backdrop option to SaveLayerRec
>
> BUG=skia:
> GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1523053003
>
> Committed: https://skia.googlesource.com/skia/+/247415969a9a5ed6c83cc09395472416c4b7de7f

TBR=robertphillips@google.com,bsalomon@google.com,mtklein@google.com
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=skia:

Review URL: https://codereview.chromium.org/1565203002

1 files changed, 2 insertions, 74 deletions

diff --git a/samplecode/SampleLayers.cpp b/samplecode/SampleLayers.cpp
index f8ebd7c94f..52bf5b357b 100644
--- a/samplecode/SampleLayers.cpp
+++ b/samplecode/SampleLayers.cpp
@@ -232,80 +232,8 @@ protected:
 private:
     typedef SkView INHERITED;
 };
-DEF_SAMPLE( return new LayersView; )
 
 //////////////////////////////////////////////////////////////////////////////
 
-#include "SkBlurImageFilter.h"
-#include "SkMatrixConvolutionImageFilter.h"
-#include "SkMorphologyImageFilter.h"
-
-#include "Resources.h"
-#include "SkAnimTimer.h"
-
-class BackdropView : public SampleView {
-    SkPoint fCenter;
-    SkScalar fAngle;
-    SkAutoTUnref<SkImage> fImage;
-    SkAutoTUnref<SkImageFilter> fFilter;
-public:
-    BackdropView() {
-        fCenter.set(200, 150);
-        fAngle = 0;
-        fImage.reset(GetResourceAsImage("mandrill_512.png"));
-        fFilter.reset(SkDilateImageFilter::Create(8, 8));
-    }
-
-protected:
-    // overrides from SkEventSink
-    bool onQuery(SkEvent* evt) override {
-        if (SampleCode::TitleQ(*evt)) {
-            SampleCode::TitleR(evt, "Backdrop");
-            return true;
-        }
-        return this->INHERITED::onQuery(evt);
-    }
-
-    void onDrawContent(SkCanvas* canvas) override {
-        canvas->drawImage(fImage, 0, 0, nullptr);
-
-        const SkScalar w = 250;
-        const SkScalar h = 150;
-        SkPath path;
-        path.addOval(SkRect::MakeXYWH(-w/2, -h/2, w, h));
-        SkMatrix m;
-        m.setRotate(fAngle);
-        m.postTranslate(fCenter.x(), fCenter.y());
-        path.transform(m);
-
-        canvas->clipPath(path, SkRegion::kIntersect_Op, true);
-        const SkRect bounds = path.getBounds();
-
-        SkPaint paint;
-        paint.setAlpha(0xCC);
-        canvas->saveLayer({ &bounds, &paint, fFilter, 0 });
-
-        canvas->restore();
-    }
-
-    bool onAnimate(const SkAnimTimer& timer) override {
-        fAngle = SkDoubleToScalar(fmod(timer.secs() * 360 / 5, 360));
-        return true;
-    }
-
-    SkView::Click* onFindClickHandler(SkScalar x, SkScalar y, unsigned modi) override {
-        this->inval(nullptr);
-        return new Click(this);
-    }
-
-    bool onClick(Click* click) override {
-        this->inval(nullptr);
-        fCenter = click->fCurr;
-        return this->INHERITED::onClick(click);
-    }
-
-private:
-    typedef SampleView INHERITED;
-};
-DEF_SAMPLE( return new BackdropView; )
-
+static SkView* MyFactory() { return new LayersView; }
+static SkViewRegister reg(MyFactory);