use Make instead of Create to return a shared shader

src/core/SkDraw.cpp

Index: src/core/SkDraw.cpp
diff --git a/src/core/SkDraw.cpp b/src/core/SkDraw.cpp
index efb19e2ec9da89b38b0c0bb35fcf490607a4f50c..31d53cf8d8cf5aa94c9aa069108002d4378a332d 100644
--- a/src/core/SkDraw.cpp
+++ b/src/core/SkDraw.cpp
@@ -81,9 +81,10 @@ public:
     SkAutoBitmapShaderInstall(const SkBitmap& src, const SkPaint& paint,
                               const SkMatrix* localMatrix = nullptr)
             : fPaint(paint) /* makes a copy of the paint */ {
-        fPaint.setShader(SkCreateBitmapShader(src, SkShader::kClamp_TileMode,
-                                              SkShader::kClamp_TileMode,
-                                              localMatrix, &fAllocator));
+        fPaint.setShader(SkMakeBitmapShader(src, SkShader::kClamp_TileMode,
+                                            SkShader::kClamp_TileMode,
+                                            localMatrix, &fAllocator));
+        fPaint.getShader()->ref();
         // we deliberately left the shader with an owner-count of 2
         SkASSERT(2 == fPaint.getShader()->getRefCnt());
     }
@@ -1676,7 +1677,7 @@ void SkDraw::drawPosText(const char text[], size_t byteLength,
 #endif
 
 ///////////////////////////////////////////////////////////////////////////////
-
+#if 0
 static SkScan::HairRCProc ChooseHairProc(bool doAntiAlias) {
     return doAntiAlias ? SkScan::AntiHairLine : SkScan::HairLine;
 }
@@ -1693,6 +1694,7 @@ static bool texture_to_matrix(const VertState& state, const SkPoint verts[],
     dst[2] = verts[state.f2];
     return matrix->setPolyToPoly(src, dst, 3);
 }
+#endif
 
 class SkTriColorShader : public SkShader {
 public:
@@ -1817,7 +1819,7 @@ void SkTriColorShader::toString(SkString* str) const {
     str->append(")");
 }
 #endif
-
+#if 0

[f(malita), 2016/03/08 15:50:35]

?

 void SkDraw::drawVertices(SkCanvas::VertexMode vmode, int count,
                           const SkPoint vertices[], const SkPoint textures[],
                           const SkColor colors[], SkXfermode* xmode,
@@ -1946,6 +1948,7 @@ void SkDraw::drawVertices(SkCanvas::VertexMode vmode, int count,
         }
     }
 }
+#endif
 
 ///////////////////////////////////////////////////////////////////////////////
 ///////////////////////////////////////////////////////////////////////////////