Remove skia::SupportsPlatformPaint()

skia/ext/platform_canvas.cc

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "skia/ext/platform_canvas.h"
 
 #include "base/logging.h"
 #include "base/memory/ptr_util.h"
 #include "build/build_config.h"
 #include "skia/ext/platform_device.h"
@@ skipping 40 matching lines @@
   void* pixels = canvas->accessTopLayerPixels(&info, &row_bytes);
   if (!pixels) {
     result->reset();
     return false;
   }
 
   result->reset(info, pixels, row_bytes);
   return true;
 }
 
-bool SupportsPlatformPaint(const SkCanvas* canvas) {
-  return GetPlatformDevice(canvas->getTopDevice(true)) != nullptr;
-}
-
 size_t PlatformCanvasStrideForWidth(unsigned width) {
   return 4 * width;
 }
 
 std::unique_ptr<SkCanvas> CreateCanvas(const sk_sp<SkBaseDevice>& device,
                                        OnFailureType failureType) {
   if (!device) {
     if (CRASH_ON_FAILURE == failureType)
       SK_CRASH();
     return nullptr;
@@ skipping 22 matching lines @@
 
   // Compensate for drawing to a layer rather than the entire canvas
   SkMatrix ctm;
   SkIRect clip_bounds;
   canvas->temporary_internal_describeTopLayer(&ctm, &clip_bounds);
 
   return platform_device->BeginPlatformPaint(ctm, clip_bounds);
 }
 
 }  // namespace skia