Add PlatformPictureSkia and RecordingPlatformDeviceSkia.

skia/ext/platform_canvas.h

Index: skia/ext/platform_canvas.h
diff --git a/skia/ext/platform_canvas.h b/skia/ext/platform_canvas.h
index cbeb95b2bbe252cf5c5ebc7bd3abeeb3ad29dcf8..11729bfbd277b4fe98d255cd199ed810db4092ac 100644
--- a/skia/ext/platform_canvas.h
+++ b/skia/ext/platform_canvas.h
@@ -115,10 +115,9 @@ SK_API SkCanvas* CreateBitmapCanvas(int width, int height, bool is_opaque);
 // and where it is possible to recover gracefully from the failed allocation.
 SK_API SkCanvas* TryCreateBitmapCanvas(int width, int height, bool is_opaque);
 
-// Returns true if native platform routines can be used to draw on the
-// given canvas. If this function returns false, BeginPlatformPaint will
-// return NULL PlatformSurface.
-SK_API bool SupportsPlatformPaint(const SkCanvas* canvas);
+// Returns support for native platform routines.
+SK_API PlatformDevice::PlatformPaint PlatformPaintSupport(
+    const SkCanvas* canvas);
 
 // Draws into the a native platform surface, |context|.  Forwards to
 // DrawToNativeContext on a PlatformDevice instance bound to the top device.