Remove skia::SupportsPlatformPaint()

skia/ext/platform_canvas.cc

Index: skia/ext/platform_canvas.cc
diff --git a/skia/ext/platform_canvas.cc b/skia/ext/platform_canvas.cc
index 81093801b624444181ea03b5f8e11f292fa27d06..eb954969eb09315f181dcff5f30e7a37d995bab4 100644
--- a/skia/ext/platform_canvas.cc
+++ b/skia/ext/platform_canvas.cc
@@ -58,10 +58,6 @@ bool GetWritablePixels(SkCanvas* canvas, SkPixmap* result) {
   return true;
 }
 
-bool SupportsPlatformPaint(const SkCanvas* canvas) {
-  return GetPlatformDevice(canvas->getTopDevice(true)) != nullptr;
-}
-
 size_t PlatformCanvasStrideForWidth(unsigned width) {
   return 4 * width;
 }