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

skia/ext/bitmap_platform_device_win.cc

Index: skia/ext/bitmap_platform_device_win.cc
diff --git a/skia/ext/bitmap_platform_device_win.cc b/skia/ext/bitmap_platform_device_win.cc
index 0f16694ea662143f20bd884cd22e0bf9993f2b4e..44ca522f11c63b75ccde47eb1979601babfa62d0 100644
--- a/skia/ext/bitmap_platform_device_win.cc
+++ b/skia/ext/bitmap_platform_device_win.cc
@@ -282,6 +282,14 @@ SkBaseDevice* BitmapPlatformDevice::onCreateCompatibleDevice(
   return Create(info.width(), info.height(), info.isOpaque(), NULL, do_clear);
 }
 
+SkBaseDevice* BitmapPlatformDevice::onCreateDevice(const CreateInfo& cinfo,
+                                                   const SkPaint*) {
+  const SkImageInfo& info = cinfo.fInfo;
+  const bool do_clear = !info.isOpaque();
+  SkASSERT(info.colorType() == kN32_SkColorType);
+  return Create(info.width(), info.height(), info.isOpaque(), NULL, do_clear);
+}
+
 // PlatformCanvas impl
 
 SkCanvas* CreatePlatformCanvas(int width,