Change device factories to take SkImageInfo instead of SkBitmap::Config

src/core/SkDeviceImageFilterProxy.h

Index: src/core/SkDeviceImageFilterProxy.h
diff --git a/src/core/SkDeviceImageFilterProxy.h b/src/core/SkDeviceImageFilterProxy.h
index 800e42c1f62d0ad743ac6cc583582b43af6adbd0..6c968e945ee41642c9253d65f9741c3d6ef7990e 100644
--- a/src/core/SkDeviceImageFilterProxy.h
+++ b/src/core/SkDeviceImageFilterProxy.h
@@ -15,8 +15,7 @@ public:
     SkDeviceImageFilterProxy(SkBaseDevice* device) : fDevice(device) {}
 
     virtual SkBaseDevice* createDevice(int w, int h) SK_OVERRIDE {
-        return fDevice->createCompatibleDevice(SkBitmap::kARGB_8888_Config,
-                                               w, h, false);
+        return fDevice->createCompatibleDevice(SkImageInfo::MakeN32Premul(w, h));
     }
     virtual bool canHandleImageFilter(const SkImageFilter* filter) SK_OVERRIDE {
         return fDevice->canHandleImageFilter(filter);