Revert "add new signature so skia can rely on it (subclass of SkDevice)"

skia/ext/bitmap_platform_device_mac.cc

Index: skia/ext/bitmap_platform_device_mac.cc
diff --git a/skia/ext/bitmap_platform_device_mac.cc b/skia/ext/bitmap_platform_device_mac.cc
index ad44f792f7faba0a8e40ef3d1ff024fe0b7a9747..9c7966da07dc9e1a7f4dee78338508142834e366 100644
--- a/skia/ext/bitmap_platform_device_mac.cc
+++ b/skia/ext/bitmap_platform_device_mac.cc
@@ -280,12 +280,6 @@ SkBaseDevice* BitmapPlatformDevice::onCreateCompatibleDevice(
   return Create(NULL, info.width(), info.height(), info.isOpaque(), do_clear);
 }
 
-SkBaseDevice* BitmapPlatformDevice::onCreateDevice(const CreateInfo& cinfo,
-                                                   const SkPaint*) {
-  // until skia lands its new virtual for this method
-  return onCreateCompatibleDevice(cinfo);
-}
-
 // PlatformCanvas impl
 
 SkCanvas* CreatePlatformCanvas(CGContextRef ctx, int width, int height,