Stop using deprecated factory API for SkDevice

skia/ext/platform_canvas_mac.cc

Index: skia/ext/platform_canvas_mac.cc
===================================================================
--- skia/ext/platform_canvas_mac.cc	(revision 91505)
+++ skia/ext/platform_canvas_mac.cc	(working copy)
@@ -10,7 +10,6 @@
 namespace skia {
 
 PlatformCanvas::PlatformCanvas(int width, int height, bool is_opaque) {
-  setDeviceFactory(SkNEW(BitmapPlatformDeviceFactory))->unref();
   initialize(width, height, is_opaque);
 }
 
@@ -18,7 +17,6 @@
                                int height,
                                bool is_opaque,
                                CGContextRef context) {
-  setDeviceFactory(SkNEW(BitmapPlatformDeviceFactory))->unref();
   initialize(context, width, height, is_opaque);
 }
 
@@ -26,7 +24,6 @@
                                int height,
                                bool is_opaque,
                                uint8_t* data) {
-  setDeviceFactory(SkNEW(BitmapPlatformDeviceFactory))->unref();
   initialize(width, height, is_opaque, data);
 }