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, 0 insertions, 74 deletions

diff --git a/gm/imagefilters.cpp b/gm/imagefilters.cpp
index 951a934d82..5f1ae84949 100644
--- a/gm/imagefilters.cpp
+++ b/gm/imagefilters.cpp
@@ -104,77 +104,3 @@ DEF_SIMPLE_GM(fast_slow_blurimagefilter, canvas, 620, 260) {
         canvas->translate(r.width() + 20, 0);
     }
 }
-
-///////////////////////////////////////////////////////////////////////////////////////////////////
-#include "Resources.h"
-#include "SkBlurImageFilter.h"
-#include "SkMatrixConvolutionImageFilter.h"
-#include "SkMorphologyImageFilter.h"
-#include "SkColorMatrixFilter.h"
-#include "SkColorFilterImageFilter.h"
-#include "SkRRect.h"
-
-static void draw_set(SkCanvas* canvas, SkImageFilter* filters[], int count) {
-    const SkRect r = SkRect::MakeXYWH(30, 30, 200, 200);
-    const SkScalar offset = 250;
-    SkScalar dx = 0, dy = 0;
-
-    for (int i = 0; i < count; ++i) {
-        canvas->save();
-        SkRRect rr = SkRRect::MakeRectXY(r.makeOffset(dx, dy), 20, 20);
-        canvas->clipRRect(rr, SkRegion::kIntersect_Op, true);
-        canvas->saveLayer({ &rr.getBounds(), nullptr, filters[i], 0 });
-        canvas->drawColor(0x40FFFFFF);
-        canvas->restore();
-        canvas->restore();
-
-        if (0 == dx) {
-            dx = offset;
-        } else {
-            dx = 0;
-            dy = offset;
-        }
-    }
-}
-
-DEF_SIMPLE_GM(savelayer_with_backdrop, canvas, 830, 550) {
-    SkColorMatrix cm;
-    cm.setSaturation(10);
-    SkAutoTUnref<SkColorFilter> cf(SkColorMatrixFilter::Create(cm));
-    const SkScalar kernel[] = { 4, 0, 4, 0, -15, 0, 4, 0, 4 };
-    SkImageFilter* filters[] = {
-        SkBlurImageFilter::Create(10, 10),
-        SkDilateImageFilter::Create(8, 8),
-        SkMatrixConvolutionImageFilter::Create({ 3, 3 }, kernel, 1, 0, { 0, 0 },
-                                           SkMatrixConvolutionImageFilter::kClampToBlack_TileMode,
-                                               true),
-        SkColorFilterImageFilter::Create(cf),
-    };
-
-    const struct {
-        SkScalar    fSx, fSy, fTx, fTy;
-    } xforms[] = {
-        { 1, 1, 0, 0 },
-        { 0.5f, 0.5f, 530, 0 },
-        { 0.25f, 0.25f, 530, 275 },
-        { 0.125f, 0.125f, 530, 420 },
-    };
-
-    SkPaint paint;
-    paint.setFilterQuality(kMedium_SkFilterQuality);
-    SkAutoTUnref<SkImage> image(GetResourceAsImage("mandrill_512.png"));
-
-    canvas->translate(20, 20);
-    for (const auto& xform : xforms) {
-        canvas->save();
-        canvas->translate(xform.fTx, xform.fTy);
-        canvas->scale(xform.fSx, xform.fSy);
-        canvas->drawImage(image, 0, 0, &paint);
-        draw_set(canvas, filters, SK_ARRAY_COUNT(filters));
-        canvas->restore();
-    }
-
-    for (auto& filter : filters) {
-        filter->unref();
-    }
-}