Minor code cleanup (left over from prior CL)

This was requested in https://codereview.chromium.org/1309543012/ (Add new GM to directly exercise perspective bitmap drawing)

Review URL: https://codereview.chromium.org/1320673011

1 files changed, 2 insertions, 4 deletions

diff --git a/gm/imagefilterstransformed.cpp b/gm/imagefilterstransformed.cpp
index 9259ce4fce..c6ff5a7931 100644
--- a/gm/imagefilterstransformed.cpp
+++ b/gm/imagefilterstransformed.cpp
@@ -54,10 +54,8 @@ protected:
     }
 
     void onOnceBeforeDraw() override {
-        fCheckerboard.allocN32Pixels(64, 64);
-        SkCanvas checkerboardCanvas(fCheckerboard);
-        sk_tool_utils::draw_checkerboard(&checkerboardCanvas, 0xFFA0A0A0, 0xFF404040, 8);
-
+        fCheckerboard = sk_tool_utils::create_checkerboard_bitmap(64, 64,
+                                                                  0xFFA0A0A0, 0xFF404040, 8);
         this->makeGradientCircle(64, 64);
     }