use Make instead of Create to return a shared shader

Partially updated call sites. Undefine the flag in SkSHader.h to convert the remaining sites.

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1772463002

Review URL: https://codereview.chromium.org/1772463002
diff --git a/src/effects/SkTileImageFilter.cpp b/src/effects/SkTileImageFilter.cpp
index 66cad47..dff8e9b 100644
--- a/src/effects/SkTileImageFilter.cpp
+++ b/src/effects/SkTileImageFilter.cpp
@@ -96,10 +96,8 @@
     SkCanvas canvas(device);
     SkPaint paint;
     paint.setXfermodeMode(SkXfermode::kSrc_Mode);
-
-    SkAutoTUnref<SkShader> shader(SkShader::CreateBitmapShader(subset,
-                                  SkShader::kRepeat_TileMode, SkShader::kRepeat_TileMode));
-    paint.setShader(shader);
+    paint.setShader(SkShader::MakeBitmapShader(subset, SkShader::kRepeat_TileMode,
+                                               SkShader::kRepeat_TileMode));
     canvas.translate(-dstRect.fLeft, -dstRect.fTop);
     canvas.drawRect(dstRect, paint);
     *dst = device->accessBitmap(false);
diff --git a/src/effects/gradients/SkGradientShader.cpp b/src/effects/gradients/SkGradientShader.cpp
index 985d459..9fe6c91 100644
--- a/src/effects/gradients/SkGradientShader.cpp
+++ b/src/effects/gradients/SkGradientShader.cpp
@@ -786,7 +786,7 @@
     desc->fLocalMatrix  = localMatrix;
 }
 
-SkShader* SkGradientShader::CreateLinear(const SkPoint pts[2],
+sk_sp<SkShader> SkGradientShader::MakeLinear(const SkPoint pts[2],
                                          const SkColor colors[],
                                          const SkScalar pos[], int colorCount,
                                          SkShader::TileMode mode,
@@ -802,10 +802,10 @@
 
     SkGradientShaderBase::Descriptor desc;
     desc_init(&desc, colors, pos, colorCount, mode, flags, localMatrix);
-    return new SkLinearGradient(pts, desc);
+    return sk_make_sp<SkLinearGradient>(pts, desc);
 }
 
-SkShader* SkGradientShader::CreateRadial(const SkPoint& center, SkScalar radius,
+sk_sp<SkShader> SkGradientShader::MakeRadial(const SkPoint& center, SkScalar radius,
                                          const SkColor colors[],
                                          const SkScalar pos[], int colorCount,
                                          SkShader::TileMode mode,
@@ -821,10 +821,10 @@
 
     SkGradientShaderBase::Descriptor desc;
     desc_init(&desc, colors, pos, colorCount, mode, flags, localMatrix);
-    return new SkRadialGradient(center, radius, desc);
+    return sk_make_sp<SkRadialGradient>(center, radius, desc);
 }
 
-SkShader* SkGradientShader::CreateTwoPointConical(const SkPoint& start,
+sk_sp<SkShader> SkGradientShader::MakeTwoPointConical(const SkPoint& start,
                                                   SkScalar startRadius,
                                                   const SkPoint& end,
                                                   SkScalar endRadius,
@@ -842,7 +842,7 @@
     }
     if (startRadius == endRadius) {
         if (start == end || startRadius == 0) {
-            return SkShader::CreateEmptyShader();
+            return SkShader::MakeEmptyShader();
         }
     }
 
@@ -854,8 +854,8 @@
 
     if (!flipGradient) {
         desc_init(&desc, colors, pos, colorCount, mode, flags, localMatrix);
-        return new SkTwoPointConicalGradient(start, startRadius, end, endRadius, flipGradient,
-                                             desc);
+        return sk_make_sp<SkTwoPointConicalGradient>(start, startRadius, end, endRadius,
+                                                     flipGradient, desc);
     } else {
         SkAutoSTArray<8, SkColor> colorsNew(colorCount);
         SkAutoSTArray<8, SkScalar> posNew(colorCount);
@@ -872,12 +872,12 @@
             desc_init(&desc, colorsNew.get(), nullptr, colorCount, mode, flags, localMatrix);
         }
 
-        return new SkTwoPointConicalGradient(end, endRadius, start, startRadius, flipGradient,
-                                             desc);
+        return sk_make_sp<SkTwoPointConicalGradient>(end, endRadius, start, startRadius,
+                                                     flipGradient, desc);
     }
 }
 
-SkShader* SkGradientShader::CreateSweep(SkScalar cx, SkScalar cy,
+sk_sp<SkShader> SkGradientShader::MakeSweep(SkScalar cx, SkScalar cy,
                                         const SkColor colors[],
                                         const SkScalar pos[],
                                         int colorCount,
@@ -890,7 +890,7 @@
 
     SkGradientShaderBase::Descriptor desc;
     desc_init(&desc, colors, pos, colorCount, SkShader::kClamp_TileMode, flags, localMatrix);
-    return new SkSweepGradient(cx, cy, desc);
+    return sk_make_sp<SkSweepGradient>(cx, cy, desc);
 }
 
 SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_START(SkGradientShader)
diff --git a/src/effects/gradients/SkLinearGradient.cpp b/src/effects/gradients/SkLinearGradient.cpp
index 15d4619..8ad1209 100644
--- a/src/effects/gradients/SkLinearGradient.cpp
+++ b/src/effects/gradients/SkLinearGradient.cpp
@@ -78,8 +78,8 @@
     SkPoint pts[2];
     pts[0] = buffer.readPoint();
     pts[1] = buffer.readPoint();
-    return SkGradientShader::CreateLinear(pts, desc.fColors, desc.fPos, desc.fCount,
-                                          desc.fTileMode, desc.fGradFlags, desc.fLocalMatrix);
+    return SkGradientShader::MakeLinear(pts, desc.fColors, desc.fPos, desc.fCount, desc.fTileMode,
+                                        desc.fGradFlags, desc.fLocalMatrix).release();
 }
 
 void SkLinearGradient::flatten(SkWriteBuffer& buffer) const {
@@ -430,9 +430,7 @@
     SkScalar* stops = stopsArray;
     SkShader::TileMode tm;
     int colorCount = RandomGradientParams(d->fRandom, colors, &stops, &tm);
-    SkAutoTUnref<SkShader> shader(SkGradientShader::CreateLinear(points,
-                                                                 colors, stops, colorCount,
-                                                                 tm));
+    auto shader = SkGradientShader::MakeLinear(points, colors, stops, colorCount, tm);
     const GrFragmentProcessor* fp = shader->asFragmentProcessor(d->fContext,
         GrTest::TestMatrix(d->fRandom), NULL, kNone_SkFilterQuality);
     GrAlwaysAssert(fp);
diff --git a/src/effects/gradients/SkRadialGradient.cpp b/src/effects/gradients/SkRadialGradient.cpp
index d175f23..1560cd2 100644
--- a/src/effects/gradients/SkRadialGradient.cpp
+++ b/src/effects/gradients/SkRadialGradient.cpp
@@ -68,8 +68,9 @@
     }
     const SkPoint center = buffer.readPoint();
     const SkScalar radius = buffer.readScalar();
-    return SkGradientShader::CreateRadial(center, radius, desc.fColors, desc.fPos, desc.fCount,
-                                          desc.fTileMode, desc.fGradFlags, desc.fLocalMatrix);
+    return SkGradientShader::MakeRadial(center, radius, desc.fColors, desc.fPos, desc.fCount,
+                                        desc.fTileMode, desc.fGradFlags,
+                                        desc.fLocalMatrix).release();
 }
 
 void SkRadialGradient::flatten(SkWriteBuffer& buffer) const {
@@ -313,9 +314,7 @@
     SkScalar* stops = stopsArray;
     SkShader::TileMode tm;
     int colorCount = RandomGradientParams(d->fRandom, colors, &stops, &tm);
-    SkAutoTUnref<SkShader> shader(SkGradientShader::CreateRadial(center, radius,
-                                                                 colors, stops, colorCount,
-                                                                 tm));
+    auto shader = SkGradientShader::MakeRadial(center, radius, colors, stops, colorCount, tm);
     const GrFragmentProcessor* fp = shader->asFragmentProcessor(d->fContext,
         GrTest::TestMatrix(d->fRandom), NULL, kNone_SkFilterQuality);
     GrAlwaysAssert(fp);
diff --git a/src/effects/gradients/SkSweepGradient.cpp b/src/effects/gradients/SkSweepGradient.cpp
index 1bdf40e..3021e4b 100644
--- a/src/effects/gradients/SkSweepGradient.cpp
+++ b/src/effects/gradients/SkSweepGradient.cpp
@@ -36,8 +36,8 @@
         return nullptr;
     }
     const SkPoint center = buffer.readPoint();
-    return SkGradientShader::CreateSweep(center.x(), center.y(), desc.fColors, desc.fPos,
-                                         desc.fCount, desc.fGradFlags, desc.fLocalMatrix);
+    return SkGradientShader::MakeSweep(center.x(), center.y(), desc.fColors, desc.fPos,
+                                       desc.fCount, desc.fGradFlags, desc.fLocalMatrix).release();
 }
 
 void SkSweepGradient::flatten(SkWriteBuffer& buffer) const {
@@ -190,8 +190,8 @@
     SkScalar* stops = stopsArray;
     SkShader::TileMode tmIgnored;
     int colorCount = RandomGradientParams(d->fRandom, colors, &stops, &tmIgnored);
-    SkAutoTUnref<SkShader> shader(SkGradientShader::CreateSweep(center.fX, center.fY,
-                                                                colors, stops, colorCount));
+    sk_sp<SkShader> shader(SkGradientShader::MakeSweep(center.fX, center.fY,  colors, stops,
+                                                       colorCount));
     const GrFragmentProcessor* fp = shader->asFragmentProcessor(d->fContext,
                                                                 GrTest::TestMatrix(d->fRandom),
                                                                 NULL, kNone_SkFilterQuality);
diff --git a/src/effects/gradients/SkTwoPointConicalGradient.cpp b/src/effects/gradients/SkTwoPointConicalGradient.cpp
index 43d6f1f..d9fc39c 100644
--- a/src/effects/gradients/SkTwoPointConicalGradient.cpp
+++ b/src/effects/gradients/SkTwoPointConicalGradient.cpp
@@ -338,9 +338,9 @@
         }
     }
 
-    return SkGradientShader::CreateTwoPointConical(c1, r1, c2, r2, desc.fColors, desc.fPos,
-                                                   desc.fCount, desc.fTileMode, desc.fGradFlags,
-                                                   desc.fLocalMatrix);
+    return SkGradientShader::MakeTwoPointConical(c1, r1, c2, r2, desc.fColors, desc.fPos,
+                                                 desc.fCount, desc.fTileMode, desc.fGradFlags,
+                                                 desc.fLocalMatrix).release();
 }
 
 void SkTwoPointConicalGradient::flatten(SkWriteBuffer& buffer) const {
diff --git a/src/effects/gradients/SkTwoPointConicalGradient_gpu.cpp b/src/effects/gradients/SkTwoPointConicalGradient_gpu.cpp
index 5b0855a..5394369 100644
--- a/src/effects/gradients/SkTwoPointConicalGradient_gpu.cpp
+++ b/src/effects/gradients/SkTwoPointConicalGradient_gpu.cpp
@@ -207,10 +207,8 @@
     SkScalar* stops = stopsArray;
     SkShader::TileMode tm;
     int colorCount = RandomGradientParams(d->fRandom, colors, &stops, &tm);
-    SkAutoTUnref<SkShader> shader(SkGradientShader::CreateTwoPointConical(center1, radius1,
-                                                                          center2, radius2,
-                                                                          colors, stops, colorCount,
-                                                                          tm));
+    auto shader = SkGradientShader::MakeTwoPointConical(center1, radius1, center2, radius2,
+                                                        colors, stops, colorCount, tm);
     const GrFragmentProcessor* fp = shader->asFragmentProcessor(d->fContext,
         GrTest::TestMatrix(d->fRandom), NULL, kNone_SkFilterQuality);
     GrAlwaysAssert(fp);
@@ -484,10 +482,8 @@
     SkScalar* stops = stopsArray;
     SkShader::TileMode tm;
     int colorCount = RandomGradientParams(d->fRandom, colors, &stops, &tm);
-    SkAutoTUnref<SkShader> shader(SkGradientShader::CreateTwoPointConical(center1, radius1,
-                                                                          center2, radius2,
-                                                                          colors, stops, colorCount,
-                                                                          tm));
+    auto shader = SkGradientShader::MakeTwoPointConical(center1, radius1, center2, radius2,
+                                                        colors, stops, colorCount, tm);
     const GrFragmentProcessor* fp = shader->asFragmentProcessor(d->fContext,
         GrTest::TestMatrix(d->fRandom), NULL, kNone_SkFilterQuality);
     GrAlwaysAssert(fp);
@@ -692,10 +688,8 @@
     SkScalar* stops = stopsArray;
     SkShader::TileMode tm;
     int colorCount = RandomGradientParams(d->fRandom, colors, &stops, &tm);
-    SkAutoTUnref<SkShader> shader(SkGradientShader::CreateTwoPointConical(center1, radius1,
-                                                                          center2, radius2,
-                                                                          colors, stops, colorCount,
-                                                                          tm));
+    auto shader = SkGradientShader::MakeTwoPointConical(center1, radius1, center2, radius2,
+                                                        colors, stops, colorCount, tm);
     const GrFragmentProcessor* fp = shader->asFragmentProcessor(d->fContext,
         GrTest::TestMatrix(d->fRandom), NULL, kNone_SkFilterQuality);
     GrAlwaysAssert(fp);
@@ -940,10 +934,8 @@
     SkScalar* stops = stopsArray;
     SkShader::TileMode tm;
     int colorCount = RandomGradientParams(d->fRandom, colors, &stops, &tm);
-    SkAutoTUnref<SkShader> shader(SkGradientShader::CreateTwoPointConical(center1, radius1,
-                                                                          center2, radius2,
-                                                                          colors, stops, colorCount,
-                                                                          tm));
+    auto shader = SkGradientShader::MakeTwoPointConical(center1, radius1, center2, radius2,
+                                                        colors, stops, colorCount, tm);
     const GrFragmentProcessor* fp = shader->asFragmentProcessor(d->fContext,
         GrTest::TestMatrix(d->fRandom), NULL, kNone_SkFilterQuality);
     GrAlwaysAssert(fp);
@@ -1173,10 +1165,8 @@
     SkScalar* stops = stopsArray;
     SkShader::TileMode tm;
     int colorCount = RandomGradientParams(d->fRandom, colors, &stops, &tm);
-    SkAutoTUnref<SkShader> shader(SkGradientShader::CreateTwoPointConical(center1, radius1,
-                                                                          center2, radius2,
-                                                                          colors, stops, colorCount,
-                                                                          tm));
+    auto shader = SkGradientShader::MakeTwoPointConical(center1, radius1, center2, radius2,
+                                                        colors, stops, colorCount, tm);
     const GrFragmentProcessor* fp = shader->asFragmentProcessor(
         d->fContext,GrTest::TestMatrix(d->fRandom), NULL, kNone_SkFilterQuality);
     GrAlwaysAssert(fp);