make SkDeviceFactory reference counted



git-svn-id: http://skia.googlecode.com/svn/trunk@1180 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/gpu/SkGpuDevice.cpp b/src/gpu/SkGpuDevice.cpp
index 036d9b5..1c70513 100644
--- a/src/gpu/SkGpuDevice.cpp
+++ b/src/gpu/SkGpuDevice.cpp
@@ -210,6 +210,11 @@
         return 0;
     }
 }
+
+SkDeviceFactory* SkGpuDevice::onNewDeviceFactory() {
+    return SkNEW_ARGS(SkGpuDeviceFactory, (fContext, fRenderTarget));
+}
+
 ///////////////////////////////////////////////////////////////////////////////
 
 void SkGpuDevice::makeRenderTargetCurrent() {